Somewhere buried in another thread Mr Clarkson mentioned a magnet/whacky compass situation which was an "aha" moment for me.... The PO's choice for compass sensor and Algae-X
So is this too close?
Welcome to the Hatteras Owners Forum & Gallery. Sign Up or Login
+ Reply to Thread
Results 1 to 10 of 22
Thread: Too close?
-
04-11-2021 08:44 PM #1
Too close?
Last edited by oscarvan; 04-11-2021 at 08:56 PM.
1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
-
Re: Too close?
Try a hand held compass and move it around the area and see if/how much it's affected.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
-
04-11-2021 10:32 PM #3
Re: Too close?
1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
-
Re: Too close?
Is that the AP compass in the bottom of the pic?
-
Re: Too close?
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
-
Re: Too close?
"DON'T BELIEVE ANYTHING YOU READ OR HEAR AND ONLY HALF OF WHAT YOU SEE" - BEN FRANKLIN
Endless Summer
1967 50c 12/71n DDA 525hp
ex Miss Betsy
owners:
Howard P. Miller 1967-1974
Richard F Hull 1974-1976
Robert J. & R.Scott Smith 1976-present
-
04-12-2021 08:31 AM #7
Re: Too close?
That is an excellent comment..DUH on me..... So now I'm Google image searching Garmin depth transducers and autopilot compasses and it appears you are right. Which means I haven't found the compass yet...... It was the "BOW" marking that sent me down the wrong path..... So do I have something "forward looking" here to map the bottom? I know OF that but have never really delved in to it......
1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
-
04-12-2021 08:31 AM #8
Re: Too close?
Have you run the boat to see if its a problem??? If the AP performs properly why mess with it ??.............
Last edited by doc g; 04-12-2021 at 08:33 AM.
-
04-12-2021 08:41 AM #9
Re: Too close?
Oh no, there is a problem. On certain headings the compass is 30º off, and with the bow aimed in the right direction telling the autopilot to navigate to a point ahead will result in an immediate turn. Eventually it will figure the drift and start correcting for what it probably thinks is a hellacious cross wind/current but that's no way to operate.
Way I'm currently working it is to aim the boat in the right direction and hit "heading hold and ignore the number. Make small changes to stay on the line. COG is, of course, in the ball park.
It works and I get there just fine, heck when I was a kid all we had was a whiskey compass uphill both ways........1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
-
04-12-2021 09:44 AM #10
Re: Too close?
It sounds like you may need to re-calibrate your AP. There is a procedure in the manual for do this.
Mine is currently the same way. Depending on the direction I'm traveling, the AP can be off by up to 15 degrees from my compass heading and/or the COG heading on on my plotter. I've just been compensating by monitoring my track on the chartplotter and tweaking the heading adjustment on the AP as necessary to keep me on course.
Recalibrating the AP has been one of those round-tuit things on my list for a while now."The only thing that always works on an old boat is the owner" - Some Wise Guy
1976 46' Convertible
Old Fort Bayou
Ocean Springs, Mississippi