Re: Raymarine Tiller pilot linking to GPS

In message <HsGBg.17402$ts3.3094@xxxxxxxxxxxxxxxxxxxx>, Dennis Pogson <dennis_nospampogson@xxxxxxxxxxxx> writes
Rich wrote:
Raymarine st 1000
I have this auto pilot and dont use it very often. Generally put it on
and click it until its going where I want to go
However I have been checking its reading and its always about 10' out
from the GPS course.
Mt main compass also reads different and so does my handbearing
compass. ie 4 compasses but all giving differnt readings.
Is there any way that the tillerpilot can be linked to the Magellan
148 GPS?
Why are the readings out on the compasses - the one tat does seem most
accurate is the GPS
Cheers
Rich
Westerly 2219 DAVICO

Are both autopliot and GPS set to the same (magnetic or true) settings?


Unless the OP's main compass has been 'swung' it will invariably read differently to the GPS.

(Question - apart from charter boats, how many regulars in ukrs have gone to the trouble/expense of swinging a compass?)

Mind you, like many others I find it difficult to steer an exact course anyway - I always try to steer within +/- 5 degrees and that's difficult enough in anything but flat calm.

Rich - see 'magnetic deviation' in most textbooks - this could also explain why your hand compass is at variance to your main compass.

--
Keith replace nospam with ilf0rd
.

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