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post #8 of Old 05-08-2002 Thread Starter
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Raytheon Bidata ST 40

good thats what I thought with the SOG reading.... doesnt work, as I dont have any seatalk gps instruments to hook up.

Leaves me the cal factor...

as I said I had the unit installed and left it in factory setting for the first year.
I know somewhat that my hull speed is somewhat around 5.5 knos... The first year i never reached more than 3.5 knots... FLYING the old

Today with the handheld GPS I adjsuted the Cal factor up....

so the instrument is fine around 3 knots ( GPS ) below 1... its not showing anything

if I am faster ..lets say 5 knots the Raytheon shows all the way up to 7 knots..

If I reduce the cal factor, than it will not show anything below 2 knots...

now for the position of the paddlewheel.
It doesnt make any difference what side the boat is leaning..... no measurable difference between starboard or port tack in the speed display ...

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