|
|
Post by olly on Jul 5, 2009 6:53:16 GMT
peeps
just got a new ritchie compass for my boat
iv checked it with my gps but they read differnt
wich 1 do i take as true?
i can callabrate the ritchie compass so is it best to set this to my gps compass
any addvice gratefull
thanx
olly
|
|
|
|
Post by spottius on Jul 5, 2009 8:44:28 GMT
Hello mate. Hope this helps. True North: the direction of a meridian of longitude which converges on the North Pole. Magnetic North: the direction indicated by a magnetic compass. Magnetic North moves slowly with a variable rate and currently is west of Grid North in Great Britain. The horizontal angular difference between True North and Magnetic North is called MAGNETIC VARIATION. The difference between Magnetic North and True North is 3 deg. If you set your gps to magnetic north the two should be pretty close. If they are still out its probably something on your boat creating a magnetic field that is interfearing with your compass. Calibration/compensation will help with this. This site will help. www.ritchienavigation.com/service/compensation.html Good luck. |
|
|
|
Post by olly on Jul 5, 2009 14:38:10 GMT
thanx spottius
should be easy to set up now
olly
|
|
