The Raymarine T70348 is a bundle includes the i70s Wind instrument, DST800 and Headng Sensor.
Raymarine i70s Wireless Wind With DST800, Heading Sensor It also provides an ultra-stable heading source for other onboard electronics including autopilots, radar systems, chart plotters and instruments. It refines the values for wind speed, wind direction, course over ground, speed over ground and cross track error by calculating out the detrimental effects of vessel yaw, pitch, roll and heel on these values.