Boat GPS Chartplotter: Top Models, Features & Buying Guide

Picture this: you’re plotting a weekend escape on the Hauraki Gulf, or maybe prepping for a serious fishing mission off Northland’s rugged coastline. The tides, the weather, and the best snapper spots all hinge on getting your navigation right. This is where a boat GPS chartplotter earns its stripes—transforming guesswork into precision and giving you the confidence to explore farther, fish smarter, and return safely every time.

A chartplotter isn’t just a glorified GPS. It’s a sophisticated system that combines satellite positioning, detailed electronic charts, and real-time navigation tools, leaving paper maps and basic handheld units in the dust. Choosing the right model means weighing up display size, sonar tech, chart compatibility, connectivity, and—crucially for New Zealand—meeting local maritime requirements.

Whether you’re kitting out a family runabout, a commercial vessel, or your pride-and-joy launch, this guide will cut through the jargon. We’ll walk through top-rated chartplotter models available in New Zealand, demystify must-have features, explain legal compliance, and share practical setup tips. From first-time boaties to seasoned operators, you’ll find straightforward advice and clear answers to the most common questions—so you can select the right gear with confidence and focus on what matters: enjoying your time on the water.

1. Understanding Boat GPS Chartplotters

Whether you’re threading your way through the Marlborough Sounds or making a beeline for the best snapper grounds in the Hauraki Gulf, your chartplotter is your navigator-in-chief. In simple terms, a chartplotter fuses GPS positioning, digital charts and route-planning tools into one display. It goes beyond what a handheld GPS device or paper chart can offer: live updates, depth contours, and automatic route recalculations as conditions change.

While it may look like a sophisticated tablet, a dedicated chartplotter boasts marine-grade hardware—sunlight-readable screens, waterproof housings and specialised inputs for sonar and onboard sensors. Understanding how your chartplotter works and what it can do is the first step to matching the right model with your boating style, whether that’s coastal cruising, serious fishing or commercial operations.

1.1 Definition & Core Functions of a Chartplotter

At its heart, a chartplotter marries three main components:

• Satellite positioning (GPS, GLONASS, Galileo) for pinpoint accuracy.
• Electronic chart rendering, displaying bathymetry and navigational symbols.
• Route management tools for plotting waypoints, creating tracks and setting up auto-routing.

Once you’ve fixed your vessel’s real-time position on the chart, the unit overlays key data—depth contours, hazards, aids-to-navigation and even tidal information. You can mark waypoints on promising fishing spots, connect them with routes, and adjust headings on the fly. Many chartplotters also calculate estimated times of arrival (ETA) based on speed-over-ground (SOG) and log your track history for review after the trip.

1.2 Differentiating Chartplotter, Fishfinder & GPS Tools

It’s easy to lump marine electronics together, but each device has its own specialty:

• Chartplotter
  Focus: Mapping, route planning and navigational overlays.
  Pros: Comprehensive navigation features, chart-based depth info.
  Cons: Sonar usually optional or requires extra modules.

• Fishfinder
  Focus: Underwater imaging using sonar technologies.
  Pros: Detailed views of fish, structure and bottom composition.
  Cons: Lacks advanced charting and route-planning.

• GPS-only Receiver
  Focus: Basic satellite positioning for speed, position and heading.
  Pros: Simple, low cost, minimal power draw.
  Cons: No chart display or depth information.

• Paper Charts
  Focus: Traditional navigation plotting on waterproof paper.
  Pros: No electronics, reliable backup.
  Cons: Static info, time-consuming updates, no real-time positioning.

Choosing the right tool often comes down to your priorities. Anglers might favour a fishfinder or combo unit, while bluewater cruisers, charter operators and surveyors will lean towards chartplotters or multifunction displays for their navigation and data-gathering capabilities.

1.3 Key Navigation Terms Boaters Must Know

Before you punch in waypoints and set off, it’s handy to brush up on essential terminology:

• Waypoint: A specific set of coordinates saved for future navigation—like a lobster-pot marker or a secluded anchorage.
• Route: An ordered series of waypoints joined by lines, guiding you from start to destination.
• Track (Track Log): A breadcrumb trail of recorded positions showing the actual path you’ve travelled.
• MOB (Man Overboard): A dedicated manoeuvre function that marks the incident location and guides you back on track.
• Bathymetry: The underwater equivalent of topography, showing depth contours and seabed features.
• SOG & COG: Speed Over Ground and Course Over Ground—your actual speed and heading relative to the Earth, accounting for current and wind drift.
• Chart Datum: The vertical reference point from which depths and heights are measured—critical when navigating shallow waters.

Armed with these basics, you’ll be better equipped to interpret chart overlays, avoid hazards and make the most of your chartplotter’s advanced features. In the next section, we’ll dive into the key technologies and specs to look for when choosing the right unit for your vessel.

2. Key Features to Evaluate in a Chartplotter

Selecting the right chartplotter means more than picking the biggest screen or the fanciest brand. It’s about matching key features to the type of boating you do—whether that’s coastal cruising, serious fishing or commercial operation. In this section we’ll break down the core feature categories you should weigh up, from display and sonar to connectivity, charts and durability. Armed with this understanding, you can compare models on a like-for-like basis and zero in on what really matters for your vessel and budget.

2.1 Display Size, Resolution & Sunlight Readability

Your chartplotter’s screen is your window to the water, so size and clarity are critical. Larger displays (10” and above) deliver more chart detail and split-screen views—great for MFDs on larger helms—while compact units (7” to 9”) suit smaller consoles or tender boats. Beyond size, look for high resolution (ideally 1280×800 pixels or higher) to ensure crisp chart lines, even when zoomed in.

Sunlight readability is non-negotiable for safe navigation. Marine-grade displays often feature anti-glare coatings, high brightness (1,000+ nits) and wide viewing angles, letting you see charts clearly in full sun. Most units carry an IPX7 or IPX8 waterproof rating, protecting the screen against spray and brief immersion. Check manufacturer specs for both brightness and ingress protection to ensure your screen stays visible and reliable at sea.

2.2 Sonar & Fishfinding Technologies

If you’re fishing, sonar can be just as important as charts. Modern chartplotters often support multiple sonar modes:

• Standard CHIRP sonar for general fish detection.
• DownScan™ and SideScan™ for detailed structure imaging.
• MEGA Imaging or similar high-frequency options for ultra-clear views in both shallow and deep water.

Choose frequencies according to your typical fishing grounds: low frequencies (50–80 kHz) for deep offshore spots, higher bands (200–400 kHz) for coastal and reef work. Some models allow you to combine CHIRP and DownScan simultaneously, giving you both fish arches and detailed bottom texture in one view. Think about transducer compatibility and whether you need an external sonar module for advanced imaging.

2.3 Positioning Accuracy & GNSS Support

A chartplotter’s navigation precision hinges on its GNSS capabilities. Entry-level units rely on GPS alone, while more accurate models use multiple constellations—GLONASS, Galileo or BeiDou—improving signal availability and reducing drift. Internal antennas simplify installation, but external antenna options can boost reception in areas of poor satellite coverage or when mounted inside a console.

Look for advertised position accuracy (often ±2–3 metres) and update rates (5 Hz or higher) to ensure smooth track logs and responsive waypoint guidance. For commercial work or offshore ventures, tighter accuracy and faster update rates can be a real advantage.

2.4 Connectivity & Networking Protocols

Chartplotters don’t work in isolation. Networking allows you to share data between units, link to autopilots and display engine or VHF/AIS information on the same screen. Key protocols include:

• NMEA 0183: Basic serial data transfer, suitable for simple integrations.
• NMEA 2000: A robust plug-and-play network for multiple devices, sharing navigation, engine and sensor data.
• Wi-Fi/Bluetooth: Wireless connectivity for smartphone or tablet apps, route planning ashore and firmware updates.

If you plan on expanding your onboard electronics—autopilot, radar, engine monitoring or AIS—make sure your chartplotter supports the necessary network standards and has spare ports for future additions.

2.5 Chart Compatibility, Data Encryption & Updates

Your chartplotter is only as good as the charts you load. Popular providers like C-MAP, Navionics+ and BlueChart g3 Vision cover New Zealand waters with detailed bathymetry, tide and current data. Ensure your unit accepts encrypted ENCs (IHO S-63 standard) if you require official chart coverage for commercial or offshore voyages.

Consider how you’ll update charts: some manufacturers offer wireless updates via built-in Wi-Fi, while others require SD/microSD cards and desktop software. Check whether chart subscriptions include regular updates and what the renewal cost is, so you’re not hit by unexpected fees.

2.6 User Interface: Touchscreen vs Keypad

Touchscreens offer intuitive pinch-zoom and tap controls, much like a tablet, making chart work and menu navigation faster. However, glove-friendly keypads or hybrid interfaces (touch + keys) can be invaluable in rough conditions or when your hands are wet. Think about how you operate your gear: if you often wear gloves or need precise button presses at speed, a keypad or rotary dial may be preferable.

2.7 Power, Build Quality & Mounting

Finally, consider the build and power requirements. Marine electronics must withstand vibration, UV exposure and temperature swings. Look for UV-resistant housings, ruggedised connectors and shock-mounted printed circuit boards. Check power consumption figures (amps at 12 V) to ensure your boat’s electrical system can support the new unit without compromising other instruments.

Mounting options also affect installation complexity and aesthetics. Bracket-mounts allow easier removal for security, while flush-mounted units offer a clean look and better protection against theft or damage. Confirm cut-out dimensions, depth behind the dash and cable access requirements before you commit to a model.

With these feature categories demystified, you’re ready to compare specific chartplotter models and see how they stack up against your priorities and boat setup. In the next section, we’ll look at New Zealand’s navigation regulations and chart requirements to keep you compliant and safe on the water.

3. Navigational Regulations & Chart Compatibility in New Zealand

Electronic chartplotters aren’t just handy gadgets—they’re part of your vessel’s safety equipment. In New Zealand, both recreational and commercial operators need to be aware of the legal requirements for navigation systems and chart usage. Below, we cover the key regulations, chart services and technical standards you’ll encounter when fitting or upgrading your chartplotter.

3.1 Maritime NZ Equipment Requirements (SOLAS Chapter V)

New Zealand’s Maritime Rules Part 45 implements the SOLAS Chapter V standards for navigational equipment.

• Commercial vessels must carry up-to-date electronic or paper charts for their operating area, plus a means of positioning (GPS). Chartplotters with ENC support satisfy this requirement.
• Recreational boaters aren’t strictly bound by Part 45, but insurers often expect electronic navigation equipment for vessels operating offshore or carrying paying passengers.
• Whether you’re skippering a charter launch or a trailer-boat, it pays to check your vessel’s survey status and ensure your chartplotter or backup charts meet the rules.

3.2 New Zealand ENC Service & Chart Regions

Land Information New Zealand (LINZ) is the national hydrographic authority responsible for official Electronic Navigational Charts (ENCs). Their NZ ENC Service provides:

• Regional chart coverage from the Three Kings Islands in the north to Campbell Island in the south.
• Weekly update notifications (Notice to Mariners) to keep bathymetry, aids-to-navigation and harbour changes current.
• Subscription options for commercial operators or one-off chart purchases for recreational users.

Chartplotter owners should register for LINZ bulletins and install ENC updates before each cruising season—or more frequently if navigating dynamic areas like harbours under construction.

3.3 Chart Formats & IHO S-63 Encryption

Official ENCs follow the International Hydrographic Organization’s S-63 standard, which encrypts and verifies chart data.

• S-63 encryption ensures chart integrity and authenticity—that your unit is displaying official data, not an out-of-date or tampered file.
• Chartplotters must support S-63 decryption to load LINZ ENCs; most modern units do, but always confirm compatibility before purchase.
• In addition to vector ENCs, some units accept raster charts (BSB), but these lack the dynamic overlay features—like depth contour shading and automated hazard warnings—of true ENCs.

3.4 Importance of Firmware & Chart Updates

An up-to-date chartplotter isn’t just a matter of navigation accuracy, it’s also a safety and compliance issue.

• Update your firmware at least once a season—or whenever your manufacturer issues a critical patch—to keep the operating system and encryption libraries current.
• Download ENC updates weekly from LINZ and load them via SD card, microSD or the chartplotter’s wireless interface.
• Use automated reminders on your phone or calendar to check for new charts and firmware, especially before long passages or commercial trips.

By staying on top of regulations, subscribing to official ENC services, and keeping your software and charts fresh, you’ll reduce risks, meet insurance requirements and enjoy stress-free navigation in New Zealand’s waters.

4. Chartplotter Form Factors: MFDs, Combos & Handhelds

Chartplotters come in a variety of shapes and sizes, each designed for different boating styles and budgets. From expansive helm-mounted displays on a commercial vessel to a pocket-sized backup in a kayak, the form factor you choose will dictate installation, power needs and the user experience. In this section we’ll explore the main hardware categories—fixed-mount MFDs, combo units, handhelds and apps—and show how they stack up for portability, cost and core features.

4.1 Fixed-Mount Chartplotters & Multifunction Displays

Fixed-mount chartplotters—often called Multifunction Displays (MFDs)—are the go-to for larger boats, charter operations and serious offshore cruisers. You’ll typically see 10” to 16” screens providing split-view options (charts, sonar and engine data side by side). These units integrate seamlessly with radar, autopilot, AIS and engine-monitoring systems via NMEA 2000 networks, giving you a consolidated dashboard for navigation, fishfinding and vessel diagnostics. Installation is more involved—flush-mount cut-outs, waterproof connectors and a stable 12 V supply are musts—but once in place, an MFD offers the most feature-rich experience on the water.

4.2 Fishfinder & Chartplotter Combos

Combo units blend chartplotter functions with dedicated sonar hardware in a single enclosure, striking a balance between navigation and fishfinding. You’ll find models in the 7” to 12” range that support CHIRP, DownScan or SideScan imaging alongside full electronic charts. For anglers who want to mark waypoints on a reef and immediately drop the net, combos deliver seamless transitions between mapping and underwater views. They’re simpler to install than a full MFD network—often requiring just one transducer cable and a power feed—making them popular for trailer-boats and weekend fishing launches.

4.3 Handheld GPS Chartplotters for Boating

If you need a portable backup or a chartplotter on a tender, handheld GPS chartplotters are hard to beat. Rugged, waterproof and powered by internal batteries, these devices slip into a jacket pocket and typically run for 8–12 hours between charges. You can load detailed coastal and harbour charts, drop waypoints, track your route and even navigate back to an emergency position. While the screen size (3” to 5”) limits split views and fine detail, a handheld is invaluable as an emergency spare or for kayaks, dinghies and shore-based route planning. Check out a selection of handheld GPS chartplotters suited to New Zealand waters.

4.4 Mobile & Tablet Chartplotter Apps

Smartphones and tablets loaded with chartplotting apps offer a cost-effective way to plan routes and view ENC or raster charts ashore and at sea. Many apps let you download charts for offline use, mark waypoints, and sync routes to your onboard unit via Wi-Fi or Bluetooth. However, consumer devices lack marine-grade brightness, heat management and waterproofing. Prolonged sun exposure can lead to glare or overheating, and a sudden spray of saltwater is enough to end an iPad’s life. Use mobile apps as a planning tool or backup, but rely on a dedicated chartplotter for primary navigation in challenging conditions.

4.5 Form Factor Comparison Table

Form Factor	Best For	Portability	Key Features	Approx. NZ$ Cost
MFD	Offshore cruising, commercial	Low (fixed)	Large screen, radar/autopilot integration	$2,000–5,000+
Combo Unit	Weekend anglers, family launches	Moderate (wired)	Chart + sonar in one, split views	$700–2,000
Handheld	Emergency backup, small craft	High (pocket)	Waterproof, battery-powered, built-in GPS	$300–700
Mobile App	Route planning, casual cruising	Very high	Offline charts, waypoint sync, low cost	$0–$200 (app)

With the right form factor, you can tailor your navigation setup to your boat size, fishing style and budget. Next, we’ll dive into detailed reviews of the top chartplotter models available in New Zealand—so you can see how these form factors translate into real-world performance and value.

5. In-Depth Reviews of Top Chartplotter Models

When it comes to serious navigation and fishfinding, the following chartplotters have earned their stripes in New Zealand waters. We’ve tested and compared each unit on display clarity, sonar performance, networking capabilities and chart support so you can see which one best fits your boat and boating style.

5.1 Garmin GPSMAP 1222xsv Plus

Overview
The GPSMAP 1222xsv Plus pairs a spacious 12″ touchscreen with rugged, IPX7-rated construction—ideal for exposed helms. Its bright display handles split-screen views effortlessly, letting you run charts, sonar and engine data side by side.

Sonar

• Built-in CHIRP traditional sonar for clear fish arches
• Garmin ClearVü™ down-imaging for photographic-quality views beneath the hull
• Garmin SideVü™ sonar for scanning structure to port and starboard

Networking & Connectivity

• NMEA 2000 and NMEA 0183 for engine data, autopilot and AIS integration
• ANT wireless interface for connecting the Quatix line of wearables
• Built-in Wi-Fi for firmware and chart updates over Garmin ActiveCaptain®

Mapping & Charts

• Supports BlueChart g3 Vision, including high-resolution bathymetry and aerial imagery
• Card slot for microSD chart cards, plus onboard storage for user waypoints

Physical Specifications

• Resolution: 1280×800 pixels
• Unit dimensions: 33.0×22.6×7.9 cm (display only)
• Power draw: 1.0–2.5 A @ 12 V (typical use)

Pros

• Large, high-resolution display with multi-window capability
• Seamless integration with Garmin marine ecosystem
• Robust waterproofing and UV resistance

Cons

• Premium price point in the NZ market
• Installation requires a substantial helm cut-out

5.2 Garmin ECHOMAP Ultra 2 10″ 105sv with GT56UHD-TM

Overview
This 10″ combo model brings Garmin LiveScope™ support to a mid-range chartplotter, making it a strong contender for anglers who demand real-time scanning sonar. The touchscreen interface feels intuitive, while wireless Sonar Sharing lets you send waypoints to other units on board.

Sonar

• LiveScope™ forward- and down-looking scanning sonar (GT56UHD-TM transducer)
• Built-in CHIRP traditional and ClearVü imaging for mid-water and bottom detail

Networking & Connectivity

• Connects via NMEA 2000 for engine and instrument data
• Wireless sharing of sonar and waypoints across compatible Garmin units
• Wi-Fi® for quick downloads of Quickdraw™ contours and software updates

Mapping & Charts

• Preloaded Navionics+ Australia & New Zealand charts with one year of updates
• Quickdraw Contours lets you create and save your own fishing maps on screen

Physical Specifications

• Resolution: 1024×600 pixels
• Dimensions: 28.6×18.4×6.8 cm
• Power draw: 0.8–2.2 A @ 12 V (typical use)

Pros

• LiveScope™ delivers near-real-time target imaging
• One-year chart update subscription included
• Wireless connectivity for easy data sharing

Cons

• Fishing-focused feature set may be overkill for pure navigation
• Screen resolution slightly lower than premium units

5.3 Humminbird APEX 13 MEGA SI+

Overview
The APEX 13 MEGA SI+ boasts a generous 13.3″, full-HD touchscreen (1920×1080 px) that excels in split views and zoomed charts. Humminbird’s MEGA Imaging™ technology takes down- and side-scan clarity to the next level, ideal for spotting structure and cover.

Sonar

• MEGA Down Imaging+™ and MEGA Side Imaging+™ for ultra-clear bottom and side-structure views
• Dual-spectrum CHIRP sonar module for broad target separation

Networking & Connectivity

• Ethernet port for networking multiple units or sharing sonar
• NMEA 2000 support for engine, autopilot and sensor integration
• Bluetooth for smartphone notifications and software updates via FishSmart® app

Mapping & Charts

• Compatible with Humminbird LakeMaster and Navionics charts
• Onboard basemap with depth contours and marked hazards

Physical Specifications

• Resolution: 1920×1080 pixels
• Dimensions: 34.2×21.5×5.9 cm
• Coverage depth: up to 1,200 ft (side/MEGA) and 5,000 ft (CHIRP)

Pros

• Exceptional imaging clarity for serious anglers
• Full-HD display with excellent colour reproduction
• Flexible networking via Ethernet and NMEA 2000

Cons

• Larger physical footprint—needs ample helm space
• Higher power draw compared to smaller combos

5.4 Lowrance HOOK-7 Fishfinder/Chartplotter

Overview
The HOOK-7 packs chartplotter and fishfinder into a compact 7″ unit, making it a popular choice for trailer-boats and small runabouts. With built-in GPS and a simple menu layout, it’s easy to drop waypoints and track your route without fuss.

Sonar

• CHIRP sonar blended with DownScan Imaging™ for a clear view of fish and structure
• Includes both 83/200 kHz and 455/800 kHz transducers to cover shallow and deep waters

Networking & Connectivity

• Basic NMEA 0183 connectivity for simple autopilot or AIS integration
• No onboard Wi-Fi—software updates via SD card

Mapping & Charts

• Navionics NZ base map preloaded, with optional Navionics+ upgrade
• MicroSD slot for additional chart cards and map layers

Physical Specifications

• Resolution: 800×480 pixels
• Dimensions: 17.9×15.4×7.4 cm
• Power draw: 0.6–1.8 A @ 12 V (typical use)

Pros

• Affordable entry point with chart and sonar in one
• Easy installation and straightforward interface
• Dual-frequency transducer included

Cons

• Smaller screen limits split-screen or detailed zooming
• No wireless updates or advanced networking

Each of these chartplotters caters to a specific boatie profile—whether you’re chasing kingfish on the edge of the continental shelf or plotting a family cruise up the coast. In the next section, we’ll compare price tiers and brand strengths to help you narrow in on the best value for your budget.

6. Comparing Chartplotter Brands & Price Ranges in NZ

Choosing the right chartplotter involves more than brand loyalty—it’s about matching your budget to the features you need. Below, we break down typical price tiers in New Zealand and compare the leading manufacturers, so you can see at a glance what to expect at each level.

6.1 Price Tiers & Expected Features

• Entry Level (<NZ$700)

  • Screen Size: 5″–7″
  • Features: Basic GPS positioning, bundled charts (often a Navionics NZ base map), CHIRP sonar, simple waypoint routing
  • Networking: Limited or NMEA 0183 only
  • Ideal for trailer-boats, tenders and kayaks

• Mid Range (NZ$700–2,000)

  • Screen Size: 7″–10″
  • Features: Touchscreen, built-in CHIRP & DownScan/SideScan, preloaded Navionics+ or C-MAP charts with 1-year updates, Wi-Fi connectivity
  • Networking: NMEA 2000 integration, wireless waypoint and sonar sharing
  • Suitability: Family cruisers, weekend anglers, mixed-use vessels

• Premium (>NZ$2,000)

  • Screen Size: 10″–16″ or larger
  • Features: High-resolution multi-window MFD, advanced sonar (LiveScope, MEGA Imaging), built-in radar/autopilot support, full ENC encryption (S-63), multi-constellation GNSS
  • Networking: Extensive NMEA 2000 backbone, Ethernet ports, Bluetooth, smartphone app integration
  • Recommended for: Offshore cruisers, charter operators, serious fishermen

Model	Screen	Sonar Features	Charts & Updates	Approx. NZ$ Price
Lowrance HOOK-7	7″	CHIRP + DownScan™	Navionics NZ base map	$500–650
Garmin ECHOMAP Ultra 2 (10″ 105sv)	10″	LiveScope™, ClearVü™, CHIRP	Navionics+ ANZ (1-year)	$1,300–1,700
Humminbird APEX 13 MEGA SI+	13.3″	MEGA Side & Down Imaging™, CHIRP	LakeMaster / Navionics compatibility	$1,800–2,300
Garmin GPSMAP 1222xsv Plus	12″	ClearVü™, SideVü™, CHIRP	BlueChart g3 Vision	$2,500–3,200
Raymarine Axiom Pro (12″+)	12″–16″	RealVision 3D™, CHIRP, radar-ready	LightHouse charts	$3,000+
Simrad NSS Evo3S	9″–16″	Dual-channel CHIRP, StructureScan™	C-MAP DISCOVER / REVEAL (optional)	$2,800–4,000

6.2 Brand Strengths & Dealer Networks

• Garmin offers an extensive model range, from compact combos to high-end multi-display systems. Strong local support through Marine Deals, Boating & Outdoors and ENL ensures parts and expertise are close at hand.
• Humminbird focuses on anglers, with market-leading imaging technologies and user-friendly interfaces. Their dealer network—led by specialist fishing and boating shops—provides tailored installation and training.
• Lowrance strikes a solid balance between affordability and performance. Widely available through major marine retailers, they’re a go-to for entry and mid-level setups.
• Raymarine & Simrad dominate the premium MFD segment. Their products excel in integration with radar, autopilot and engine monitoring. Exclusive dealers and workshops in Auckland and Christchurch handle complex installations and after-sales service.
• Online Retailers & Specialists: Beyond traditional stores, platforms like Action Outdoors supply chartplotters and accessories nationwide, with advice tailored to New Zealand waters.

6.3 Warranty, Support & Software Updates

• Standard Warranties: Most manufacturers offer a two-year warranty in NZ, covering defects in materials and workmanship.
• Extended Options: Garmin and Humminbird provide extended protection plans or accessory warranties, often purchasable at checkout.
• Software & Chart Updates:
  • Garmin ActiveCaptain® and Humminbird’s FishSmart® apps streamline wireless firmware and chart updates.
  • Lowrance and Simrad units typically rely on SD/microSD cards and desktop utilities—ensure you register your device to unlock free updates.
• Local Service Centres: Certified service centres in major ports handle repairs, calibration and software support. Regular firmware updates not only add features but also patch security and encryption libraries, so set a reminder at the start of each season to check your unit’s software status.

With these price tiers, brand strengths and support networks in mind, you can zero in on the chartplotter that best matches your budget, boating style and long-term needs in New Zealand waters.

7. How to Choose the Right Chartplotter for Your Needs

Picking the ideal chartplotter comes down to matching your vessel’s characteristics, how you use it on the water, and the budget you have in mind. Rather than getting dazzled by every feature on the spec sheet, work through a simple checklist: measure your helm, list your must-have functions, align price with performance, and think ahead to future add-ons. This approach will help you narrow the field and land on the unit that feels like it was designed for your boat.

7.1 Assess Your Boat’s Size & Helm Space

Your console dictates the maximum screen size you can fit. Begin by measuring the available panel area and consider whether a flush or bracket mount suits your helm layout. Larger MFDs (10″+) offer multi-window views but demand a cut-out the size of a small cutting board and a stable mounting surface. On tenders or kayaks, a compact 7″–9″ unit or even a handheld device might be the most practical choice.

7.2 Define Your Boating Activities

List your primary on-water pursuits:

• Fishing: Prioritise sonar quality—look for CHIRP, DownScan or MEGA imaging and a dedicated transducer.
• Coastal Cruising: Detailed charts and route planning tools top the list, along with sunlight-readable displays.
• Offshore/Commercial: Redundancy, ENC encryption (S-63) and multi-constellation GNSS support become critical for safety and compliance.

Match the unit’s strengths to how you spend most of your time afloat.

7.3 Balance Budget Against Key Features

Chartplotter prices range from under NZ$700 for basic combos to over NZ$3,000 for premium MFDs. Identify the features you can’t live without—say, a 12″ screen or LiveScope sonar—then see where those options sit in each price tier. If advanced imaging pushes you into the mid-range, you might accept a smaller screen or simpler networking. Conversely, if chart detail is your priority, you might trade down on sonar and save for a chart subscription.

7.4 Plan for Future Expansion

Even if you’re buying a standalone unit today, think about tomorrow’s upgrades. Check for spare NMEA 2000/0183 ports, Ethernet connections and Wi-Fi/Bluetooth support. If you anticipate adding radar, autopilot or AIS, select a chartplotter with an open-architecture network. That way, you avoid costly replacements when you decide to expand your system.

By working through your helm dimensions, boating style, budget constraints and upgrade path, you’ll end up with a chartplotter that not only fits your boat but also grows with your adventures on New Zealand’s waters.

8. Installation, Setup & Maintenance Tips

Fitting and maintaining your chartplotter correctly is just as important as choosing the right model. A well-installed system will deliver reliable navigation, clear sonar returns and trouble-free operation season after season. In this section we cover best practices for mounting, wiring, transducer installation, chart updates, and routine care—so you can spend more time enjoying the water and less time troubleshooting gear.

8.1 Mounting: Flush vs Bracket

When it comes to mounting your chartplotter, you have two main options:

• Flush Mount
  • Cut a precise dashboard opening to the manufacturer’s specified dimensions.
  • Use the supplied rubber gasket to form a watertight seal.
  • Secure the unit with mounting brackets or clamps from behind the dash.
  • Pros: Sleek appearance, added theft resistance, better spray protection.
  • Cons: More complex installation, requires cutting and reinforcing the helm panel.

• Bracket Mount
  • Attach the bracket to the helm surface with marine-grade fasteners.
  • Slide the chartplotter into the bracket and lock it in place.
  • Pros: Quick installation and removal, ideal for tender boats or shared vessels.
  • Cons: Unit protrudes into cockpit space, reduced protection against spray and impact.

Regardless of style, double-check that the display is at a comfortable viewing angle, clear of obstructions, and within easy reach. Always use stainless-steel or corrosion-resistant hardware and seal any new holes with marine sealant.

8.2 Power & NMEA Network Wiring

A reliable power supply and correct network wiring are critical for stable operation:

1. Power Feed

   • Run a dedicated 12 V cable from the battery’s positive terminal, protected by an inline fuse (typically 2–5 A).
   • Connect the chartplotter’s ground lead to the vessel’s common negative bus.
   • Use tinned, marine-grade cable and heat-shrink crimp terminals to prevent corrosion.

2. NMEA 0183 / NMEA 2000

   • For simple integrations (VHF, AIS), NMEA 0183 uses TX/RX wire pairs—ensure matching baud rates in both devices.
   • NMEA 2000 requires a backbone cable, T-connectors for each instrument, a termination resistor at each end, and a single power drop.
   • Keep drop-line lengths under 6 m and use proper cable clamps to minimise chafe.

3. Wireless Options

   • If your unit supports Wi-Fi or Bluetooth, follow manufacturer instructions for pairing and secure your network with a strong password.
   • Remember that wireless connectivity can simplify chart and firmware updates, but shouldn’t replace wired power and sensor connections.

8.3 Transducer Installation & Calibration

Your transducer is the link between the chartplotter and the fishfinding world; installing it correctly ensures clear, accurate sonar returns:

• Transom Mount
  • Position the transducer so the face is immersed in water at all cruising speeds, typically 50–100 mm below the hull’s bottom line.
  • Align it vertically and parallel to the hull centreline for symmetric beam coverage.
  • Use the recommended bracket hardware and seal all holes with marine sealant.

• Flush / Thru-hull Mount
  • Select a hull location free from turbulence—away from strakes, shafts and stern tubes.
  • Drill the hole to the exact diameter specified and chamfer the edges.
  • Insert the transducer and secure it with the manufacturer’s locking nut and sealant.

• Calibration
  • Access the sonar settings menu and set the correct transducer type and frequency.
  • Adjust the speed-through-water calibration by comparing GPS speed with transducer speed (use a known distance over ground).
  • Fine-tune gain, range and noise rejection for the clearest bottom and fish arches.

8.4 Chart Loading & ENC Update Process

Keeping charts current is essential for safety and compliance:

1. Obtaining Official ENCs

   • Subscribe or purchase charts from Land Information New Zealand’s NZ ENC Service.
   • Download the S-63 encrypted ENC files to your computer.

2. Loading Charts

   • Copy ENC files onto a compatible SD or microSD card, ensuring folder structure matches the chartplotter’s requirements.
   • Insert the card into the chartplotter’s slot and follow the on-screen prompts to import new charts.
   • Verify the checksum or digital signature if prompted, confirming chart integrity.

3. Update Schedule

   • Check for weekly updates from LINZ, particularly before summer and any harbour works or dredging.
   • Update firmware and chart libraries in the off-season or via the unit’s wireless interface, if supported.
   • Keep a spare card with backup charts on board as a failsafe.

8.5 Routine Maintenance & Troubleshooting

A little preventative care goes a long way to extend your chartplotter’s lifespan:

• Screen & Housing

  • Wipe the display with a soft, lint-free cloth and mild soapy water. Avoid ammonia-based cleaners.
  • Inspect seals and gasket once a season; replace if brittle or misshapen.

• Connectors & Cables

  • Spray marine-grade dielectric grease into all multi-pin connectors to repel moisture.
  • Check cable runs for chafe or damage and secure loose wires with cable ties.

• Firmware & Software

  • Register your unit with the manufacturer to receive update notifications.
  • Apply firmware patches and chart updates promptly to resolve bugs and maintain encryption compatibility.

• Common Issues

  • No GPS Lock: Ensure the antenna or unit has a clear sky view; restart the device if satellites fail to appear.
  • Erratic Sonar Returns: Verify transducer alignment, adjust gain settings and check for marine growth on the faceplate.
  • Chart Errors or Freezes: Reformat the SD card, reload charts following the correct folder path, and confirm the card’s class (Class 10 recommended).

By following these installation, setup and maintenance tips, you’ll keep your boat GPS chartplotter operating at peak performance—so you can navigate confidently and focus on the adventure ahead.

9. Handheld Devices, Apps & Combo Units: Exploring Alternatives

Even the most dedicated boatie can benefit from backup or complementary navigation tools. Whether you’re paddling a kayak, planning routes ashore or want a single-screen solution for charting and fishing, handheld devices, mobile apps and combo units offer flexible options. Each brings its own strengths—and a few trade-offs—to help you stay on course, find fish or simply double-check your main system when the unexpected strikes.

9.1 Handheld GPS Chartplotters

Handheld chartplotters are the go-anywhere navigators. Housed in rugged, waterproof cases (often IPX7 or IPX8 rated), they survive drops, salt spray and a dunk in the drink. Battery life typically ranges from 8 to 15 hours, with replaceable AA or built-in lithium cells so you won’t run out of juice on a multiday trek.

These units shine in small-craft scenarios—kayaks, tenders or chasing whitebait up the river—and make invaluable emergency backups on larger boats. You can preload detailed coastal charts, mark waypoints for fishing spots or pick up a Man Overboard (MOB) function if your main console goes dark. For a solid selection of handheld GPS chartplotters purpose-built for New Zealand waters, check out a range at Burnsco’s Boating Electronics.

9.2 Mobile & Tablet Chartplotter Apps

Smartphones and tablets have transformed route planning and chart review. Apps like Navionics Boating, C-MAP or the free Simrad® App let you download official ENCs or raster charts for offline use. At home, you can plot waypoints, build routes and simulate passages on a large tablet screen, then sync data wirelessly to your onboard chartplotter.

However, consumer devices aren’t marine-grade. Screen glare, limited brightness and the risk of overheating in full sun can hamper visibility, while water ingress or impact damage remains a constant threat. Even the toughest “rugged” case won’t match a true IPX7 waterproof display. Use mobile apps as a planning tool or secondary reference, but rely on dedicated hardware for primary navigation in demanding conditions.

9.3 Fishfinder & Chartplotter Combo Units

Combo units deliver the best of both worlds—full electronic charts alongside integrated sonar—packaged in one compact display. Perfect for weekend anglers and family launches, these devices let you mark a promising reef on the chart and immediately switch to DownScan™ or CHIRP views to target snapper, kahawai or kingfish.

Popular models span entry-level to high-end:

• Entry (<NZ$1,000): Lowrance HOOK-7, offering CHIRP + DownScan™ plus Navionics NZ charts.
• Mid (NZ$1,000–2,000): Garmin ECHOMAP Ultra 2 (10″), with LiveScope™ support and Navionics+ ANZ.
• Premium (>NZ$2,000): Humminbird APEX 13 MEGA SI+, featuring MEGA Side & Down Imaging™ and LakeMaster/Navionics compatibility.

Installation is usually straightforward—one power feed and a single transducer run—making combos a popular choice for trailer-boats or second-vessel setups. If your day on the water swings between charted navigation and fishing hotspots, a combo unit brings both functions together in a seamless, cost-effective package.

10. Common Boat GPS Chartplotter Questions Answered

Even seasoned skippers and weekend anglers encounter the same handful of queries when it comes to boat GPS chartplotters. Below are concise answers to the most frequently asked questions, with a focus on how things work here in New Zealand.

10.1 Can I use my phone or tablet as a chartplotter?

Yes, your phone or tablet can run charting apps and display ENC or raster charts, but there are trade-offs. Consumer devices struggle with sunlight glare, limited brightness and potential overheating in full sun. They’re also not marine-grade waterproof, so a sudden spray could render them useless. Use a mobile device for route planning ashore or as a secondary reference, but rely on a dedicated chartplotter—built to IPX7/IPX8 standards with anti-glare screens—for primary navigation and safety at sea.

10.2 What is the difference between a chartplotter and a fishfinder?

At first glance they may seem similar, but each device has a distinct focus:

• Chartplotter: Concentrates on mapping and route-planning. It overlays GPS position on electronic charts, displays depth contours and navigational aids, and helps you set waypoints, routes and track logs.
• Fishfinder: Uses sonar (CHIRP, DownScan, SideScan) to image underwater structure and fish targets. It doesn’t provide detailed charts or route management.
• Combo Units: Marry both functions in one: full charting plus integrated sonar. Ideal for anglers who switch between plotting waypoints and dropping a line.

Choose the device that aligns with your main activity—serious navigation or focused fishfinding—or opt for a combo if you need both.

10.3 Why are chartplotters more expensive than consumer tablets?

Marine chartplotters command a premium because they incorporate specialised hardware and engineering:

• Sunlight-Readable Screens: High-brightness displays (1,000+ nits) with anti-glare coatings that stay legible in full sun.
• Rugged Construction: Waterproof housings (IPX7/8), UV-resistant plastics and shock-mounted electronics to withstand salt spray, vibration and temperature swings.
• Thermal Management: Designed to operate continuously without overheating, even in a hot, exposed helm.
• Specialised Inputs: Dedicated sonar, NMEA 0183/2000 and GPS/GLONASS antenna interfaces—for reliable integration with marine sensors.

All of this adds up to a cost that far exceeds a standard tablet, but it also delivers the reliability and safety features you need on New Zealand waters.

10.4 What is a good GPS chartplotter for my boat?

That depends on your boat size, boating style and budget:

• Small Runabouts & Trailer-Boats: Lowrance HOOK-7 offers a 7″ display, CHIRP + DownScan™, and Navionics NZ charts for under NZ$700.
• Weekend Anglers & Family Cruisers: Garmin ECHOMAP Ultra 2 10″ 105sv with LiveScope™, Navionics+ ANZ and one-year chart updates strikes a balance around NZ$1,300–1,700.
• Serious Offshore & Commercial Use: Garmin GPSMAP 1222xsv Plus (12″), with ClearVü™, SideVü™ and BlueChart g3 Vision, or Humminbird APEX 13 MEGA SI+ (13.3″ Full HD), deliver premium features above NZ$2,500.
• Flexible Expansion: Raymarine Axiom Pro or Simrad NSS Evo3S MFDs (10″–16″) excel at integrating radar, autopilot, AIS and multiple sonar sources.

Match screen size, sonar capabilities, chart support and networking protocols to your vessel and plans. If you’re still unsure, drop into Action Outdoors in Auckland or check out our website at actionoutdoors.kiwi for personalised advice and stock availability.

Wrapping Up Your Chartplotter Purchase

Choosing the right boat GPS chartplotter comes down to three essentials: matching hardware to your boating style, meeting New Zealand’s navigational regulations, and ensuring a proper installation. By weighing display size, sonar capabilities, chart compatibility and networking options against your helm space and budget, you’ll end up with a system that feels tailor-made for your vessel.

Use this guide to shortlist the models that tick your boxes—whether you’re after a compact combo for weekend fishing or a full-blown MFD for offshore charter work. Double-check Maritime NZ requirements for ENC encryption and chart updates, and plan for professional mounting, wiring and transducer calibration to guarantee smooth performance and legal compliance.

Keeping your chartplotter in peak condition also means regular firmware and chart updates, routine connector inspections and mindful screen care. A well-maintained unit not only prolongs its lifespan but also delivers the rock-solid navigation you need to tackle New Zealand’s coastline with confidence.

Ready to finalise your choice? For personalised recommendations, the latest models and expert installation support, drop by our Auckland store or browse our full range online at Action Outdoors. Let our marine electronics specialists help you make your next trip the best one yet.