The Raymarine i40 Speed is designed especially for small vessels and scenarios where simplicity and efficiency are paramount. This small yet capable instrument displays your boat’s speed with large, easy-to-read digits, which is extremely helpful even in dynamic conditions underway. You can monitor your current speed in knots, as well as see the peak speed achieved and the average speed over your trip. In addition, the i40 Speed tracks distance traveled – both for individual trips and the boat’s total log – and water temperature, which is of interest to anglers and swimmers. With three intuitive buttons, switching data displays or resetting the trip log is quick and easy. The instrument’s extremely low power consumption allows for long operation without straining the batteries – crucial for boats without generators or those relying on solar/wind charging. The i40 Speed can connect to the classic SeaTalk network, enabling it to share data or serve as a speed repeater in a multi-display setup. Using an adapter, it can also integrate into a modern SeaTalkng/NMEA2000 network, providing flexibility when upgrading systems. Overall, the i40 Speed offers small boats big functionality in a small package – it’s easy to install, reliable, and user-friendly.
- Best suited for small sailboats, inflatable RIBs, and powerboats under ~25–30 ft, where dashboard space is limited and low power draw and simplicity are valued
- Helps the skipper of a small vessel monitor speed for more efficient cruising and compliance with speed restrictions (e.g., in harbor zones or protected areas)
- Often paired with the i40 Depth (and optionally i40 Wind) as a set of basic navigation instruments for small boats and yachts – providing affordable electronics for beginners or budget-conscious projects
- Installation is quick – the display can be flush-mounted in a console or bracket-mounted; it’s an excellent upgrade to replace older instruments (e.g., ST40 series), delivering improved clarity and compatibility with newer systems
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Instrument:Digital and analog systems




