Transducers and Related Items
If it floats, we’ve probably got the right transducer for it.
cannot always compare a water-based speed (paddlewheel) to a location-based
speed (GPS). They are really measuring two different speeds two
different ways. GPS measures your speed across the face of the earth,
assuming a perfectly straight course, the paddlewheel measures your speed
through the water. The only factor to affect the speed reading for the
GPS is the accuracy of the GPS system and the course of the boat.
Current, wind, course and the way the water strikes the paddlewheel all
affect the water based speed measurement.
The GPS system uses clocks that are only
off by fractions of a second every one thousand years. There is no
paddlewheel system that has near the accuracy of a GPS. One knot is
probably within the speed tolerance specification for this
gauge. However GPS speed does not react quickly to fast stops and