[C320-list] Knot meter cleaning.... In water?

[Richard A. Walker]

You do this my running a measred mile or pass between two known  
points.  I cal my B&G instrument two times a year.  I have found  
that's simple new impellar will change the instrument 15%

In the ocean it is rate for the Gps COG to match the knot meeter




Cheers

Dick Walker
740 Olive Ave.
Coronado, CA
619.435.8986

On Aug 23, 2009, at 16:15, "Stephen Cox" <scox at timmin.com> wrote:

>
>>
>> ....................... And even when it's working, I don't
>> believe it. The GPS shows SOG numbers that are always one or
>> two knots higher than the knotmeter reads. (OK guys, please
>> no e-mail telling me that SOG is different, etc. etc.)
>> ...
>
> If its consistently different allowing for current, then you need to  
> adjust
> the calibration. Assuming its Raymarine that's easy enough from the  
> display.
> (Don't know about other brands).
>
>
> Stephen Cox
> Tegwen #1141
>