advanSea Depth S400: Hi-Performance Depth Sounder with Giant Digits

The advanSea Depth S400 redefines on-board depth awareness for serious sailors. Built for peak performance and rock-solid reliability, this depth sounder turns complex underwater data into instant, readable readouts. Read depth at a glance with giant 45 mm digits and amber backlighting, designed to stay legible from cockpit glare to squally spray—so you can keep your focus on the task at hand, whether you’re pushing for a racing edge or cruising with confidence.

From the helm to the rail, clarity matters. The S400 features a wide-angle, anti-fog LCD that resists the elements while preserving contrast in rough seas or bright sun. Its depth information is precise and actionable, with a broad range and thoughtful resolution that helps you make quick, informed decisions in changing conditions.

Key Features that Elevate Your Navigation

• Giant 45 mm digits with amber backlight and five brightness levels for fast, at-a-glance depth, elevation, or alarm readings in any light.
• Wide-angle, anti-fog LCD designed for clear visibility even when spray or spray-swept cabins reduce readability.
• Depth range 0.5–199 m (1.6–652 ft) with keel offset and a precise 0.1 m resolution up to 19.9 m, then 1 m from 20 to 199 m. Depth readouts stay meaningful as you change depth.
• Flexible transducer options — compatible with thru-hull tdx transducers from leading brands (Airmar or Plastimo) and able to operate as a stand-alone instrument with intelligent transducers or an NMEA0183 source.
• NMEA0183 compatibility with one input and one output port supporting common sentences (VHW, VTG, DPT, VLW, MTW, RMC, DBT input; MTW, DPT, DBT output). Seamless integration into existing marine networks.
• Easy integration and upgrade as a drop-in replacement for Navman 3100 and Northstar 310 installations, leveraging the same transducers for a straightforward upgrade path.
• Rugged, field-ready design with a compact 112 × 112 mm exterior, 48 mm drilling diameter, rear locking collar, O-ring bulkhead mounting, and a weather cover for harsh marine environments. IP66-rated front with anti-condensation protection.
• Operational versatility including dual alarms (high/low depth, low battery), depth trend indication, and a simulation mode to test setups without water.
• Powerful yet practical — operates on 10–16.5 V with typical current under 150 mA, built to endure from -10 to 50 °C (storage down to -20 °C, up to 60 °C). Weather-ready with a dedicated cover.
• Clear, durable display — monochrome TN LCD with transflective technology, amber backlit screen, and backlit keys for ease of use in low-light conditions.
• Warranty and support — 2-year warranty with worldwide Plastimo support, giving confidence on long voyages.

Why This Depth Sounder Works for You

Whether you’re threading a coastal passage or lining up a tactical race plan, the S400 converts underwater data into a dependable readout you can trust in foul weather and changing light. The combination of ultra-legible digits, robust construction, and flexible integration options helps you avoid shallow hazards, optimize buoy-turn decisions, and execute race strategies with precision. In practice, it means fewer guesswork moments and more time on the tactics that matter.

Ideal For

Coastwise cruising, offshore racing, and any voyage where depth awareness must stay reliable under pressure. The S400’s compatibility with common transducers and NMEA networks makes it a versatile upgrade to existing marine electronics, delivering a high-contrast readout that remains readable in glare, spray, or low-light scenarios.

Practical Use and Installation Insights

Designed as a straightforward instrument to install and operate, the Depth S400 uses a compact footprint and a standard 48 mm drilling diameter. Its optional weather cover protects the face on exposed pilings or in open decks, while the IP66 front rating ensures resilience against sea spray. For testing or training setups, the built-in simulation mode allows you to verify alarms and readings before you head offshore. Depth readouts are presented with precise increments, and the keel offset helps tailor readings to your boat’s hull geometry.

Technical Snapshot (Key Specs in Plain Language)

• Display: monochrome TN LCD with transflective technology, amber backlit screen, 5 brightness levels
• Display size and mount: 112 × 112 mm body, 48 mm drilling diameter, rear locking collar
• Power: 10–16.5 V, typical current <150 mA
• Operating conditions: -10 to 50 °C; storage -20 to 60 °C
• Waterproof rating: IP66 front (weather cover included)
• Depth range: 0.5–199 m (variable with transducer)
• Depth resolution: 0.1 m up to 19.9 m; 1 m from 20 to 199 m
• Alarms: high/low depth, low battery
• Connectivity: NMEA0183 input/output, supports common sentences
• Transducers: thru-hull options from Airmar or Plastimo; stand-alone operation possible
• Warranty: 2-year warranty with Plastimo global support

With the advanSea Depth S400, you’re choosing a marine electronics solution that blends purpose-built depth sensing with user-friendly operation. It’s a dependable partner for both the demanding racer and the leisurely navigator who refuses to compromise on situational awareness.