AdvanSea Speed S400: Marine Speedometer with Plastic Thru-Hull TDX for Racing and Cruising

The AdvanSea Speed S400 is a purpose-built marine instrument that brings clarity, reliability, and real-time data to the helm—whether you’re chasing starts on a racecourse or navigating after sunset on a coastal cruise. Designed for offshore conditions, this compact display packs speed, distance, and environmental readings into one rugged, easy-to-read unit. The result is decisive information you can trust when every tenth of a knot matters.

Crystal-clear visibility in any condition

Large 45 mm digits ensure instant readability even when spray or glare is a factor, and the monochrome TN LCD with transflective backlight delivers sharp, high-contrast readouts. An amber backlit keypad provides five brightness levels for day or night use, so you stay in control no matter the lighting or weather.

Hardy, offshore-ready construction

With IP66 protection and an anti-fog coating, the S400 stays legible in humidity, salt spray, and spray-filled spray zones. The rugged housing is designed for continuous marine use, giving you dependable performance mile after mile.

Rich, actionable data at a glance

• Speed readings: 0–60 knots on water speed, plus GPS speed when connected to a compatible navigator for true-performance analytics.
• Integrated logs and timers: Total and trip log, elapsed time, and a countdown race timer help you pace starts, measure laps, and track progress without extra gear.
• Environmental context: Water temperature and a speed trend indicator provide critical context for throttle decisions and ride quality.
• Alarms for awareness: High/low speed alerts and a low-battery warning keep you informed of changing conditions on deck.

Flexible integration for any helm setup

Operate the S400 as a standalone display or wire it into your vessel’s data network with NMEA0183 input/output. It supports key data streams such as VHW, VTG, DPT, VLW, MTW, RMC, and DBT, with a half‑duplex bus at 38400 baud for straightforward installation. When paired with compatible transducers, you can switch between water speed, GPS speed, and optional depth data without swapping instruments.

Through-hull installation kit and upgrade options

Your package includes a Plastic TDX transducer, plus a rear locking collar and bulkhead seal for a watertight fit (drill 48 mm). The S400 is designed for easy upgrades in existing helm setups and is compatible as a practical replacement option for Navman 3100 and Northstar 310 series transducers, simplifying upgrades without major rewiring.

Versatile for racers and cruisers alike

Racers rely on the countdown timer to pace starts and measure laps, while cruisers depend on accurate surface and GPS speeds for planning routes and estimating arrival times. The AdvanSea S400’s large digits stay legible in spray, and the anti-fog finish keeps critical data visible in humid or salt-laden environments. When used with Airmar or Plastimo transducers, you can tailor data depth to your preferred helm position or run it as a lean, minimal-wiring display.

Why choose AdvanSea

AdvanSea engineers marine instruments with a focus on precise data delivery, durable construction, and ease of use at the helm. The S400 combines speed, distance, and environmental insight into a single, dependable display, backed by a 2-year warranty and worldwide Plastimo support for confidence offshore.

What you get and how it helps you

• Accurate surface speed and GPS speed at a glance for informed throttle decisions
• Race-ready timers and logs to measure performance without extra gear
• Environmental awareness with water temperature and speed trend data
• Robust protection against spray, humidity, and salt with clear visibility in all conditions
• Simple, flexible installation and upgrade path for existing helm setups

With the AdvanSea Speed S400 at the helm, you gain a trusted, purpose-built instrument that translates complex data into clear, actionable insights—helping you sail faster, navigate smarter, and cruise with confidence.