Airmar’s next-generation “Smart” speed sensors combine speed, depth and fast-response water temperature in a compact through-hull fitting with no moving parts. Eliminating the paddlewheel minimizes fouling and reduces maintenance, according to Airmar. Designed for racing sailboats and long-range cruisers, the DX900+ dual-axis electromagnetic sensor measures forward and transverse speed, and it outputs leeway angle, heel and trim. $1,200. (The company also introduced ultrasonic sensors for all types of cruising boats.) Airmar Technology, Milford, New Hampshire, (603) 673-9570. airmar.com
This article originally appeared in the May 2018 issue.