With the GPS NMEA to analog paddlewheel signal converter
GPLS012 you no longer use any through-hull transducer with
your speed log. The device reads your speed over ground
from the GPRMC NMEA sentence sent by the GPS. It creates a
pulsed signal identical to that of a transducer and
transmits it to the speed log or the navstation . All the
functions of the speed log are avalaible. More the speed
log displays now the speed and distance over the ground
which is more accurate than the water speed.
If you only need to display the speed over ground of the
boat on a repeater, you do not even need to have a speed
log device. You can connect directly an analog repeater
(digital or needle) to the GPLS012 to obtain a display of
the speed anywhere on the boat.