Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: Strip: hatches
By:Mike Savage
Date: 9/19/2007, 6:40 am
In Response To: Re: Strip: hatches (Bill Hamm)

: Sure ok, magnets don't effect compasses. Heck you can't have iron too close
: to a compass or it'll be effected, let alone a magnet.

: Bill H.

Hi Bill,
Yes, magnets and iron will effect a compass. The hatch magnets aren't the problem one would think. When the hatch is closed, the magnetic force lines are 'focused' more closely to the magnets, decreasing any effect on the compass.

Anyway, doesn't anyone do a bearing check on their compass amymore?
Easy enough to do with a kayak.
Put the kayak on some kind of turntable. Line the kayak up with a defined mark and take the compass reading. Turn the kayak slowly and keep an eye on the compass reading. If the needle stays lined up as the kayak turns, the hatch magnets are not interfering.
If there is deflection, a nav compass can be adjusted to take account of the problem.

Oddly enough, I have a watch (a cheap one) with a compass function and it doesn't show any deflection near iron objects, like my trike or bike. It's fairly accurate, though I wouldn't navigate a ship in a channel with it, but it's good enough for kayaking. It's my back-up compass now.

Mike Savage
South West Cork

Messages In This Thread

Strip: hatches
Aaron -- 9/17/2007, 5:55 pm
Re: Strip: hatches
John Eberly -- 9/20/2007, 12:05 pm
Re: Strip: hatches *Pic*
Bryan Hansel -- 9/18/2007, 9:04 pm
Re: Strip: hatches on Iggy
kelly t -- 9/18/2007, 10:37 pm
Re: Strip: hatches on Iggy
Bryan Hansel -- 9/19/2007, 10:13 am
Re: Strip: hatches
Bob Deutsch -- 9/18/2007, 10:34 am
Re: Strip: hatches
Bill Hamm -- 9/18/2007, 6:27 pm
Re: Strip: hatches
Bill Hamm -- 9/18/2007, 6:25 pm
Re: Strip: hatches
Bill Hamm -- 9/18/2007, 10:08 am
Re: Strip: hatches *LINK*
jason goslin -- 9/18/2007, 10:40 am
Re: Strip: hatches
Bill Hamm -- 9/18/2007, 6:22 pm
Re: Strip: hatches *LINK*
Jay Babina -- 9/18/2007, 9:56 am
Re: Strip: hatches
Holmes -- 9/18/2007, 3:01 pm
Re: Strip: hatches
Hyok -- 9/18/2007, 3:20 pm
Re: Strip: hatches
Pedro Almeida -- 9/18/2007, 1:05 am
Re: Strip: hatches
Charles Robinson -- 9/18/2007, 9:27 am
Links
Pedro Almeida -- 9/19/2007, 9:15 pm
Re: One more *LINK*
Rod Tait (Orca Boats) -- 9/20/2007, 11:29 am
Re: One more
Pedro Almeida -- 9/21/2007, 5:08 pm
Re: Links
Bill Hamm -- 9/20/2007, 3:05 am
Re: Strip: hatches
Mike Braun -- 9/18/2007, 2:54 pm
Re: Strip: hatches
Bill Hamm -- 9/18/2007, 9:57 am
Re: Strip: hatches
Rob Macks / Laughing Loon -- 9/19/2007, 11:40 am
Re: Strip: hatches
Bill Hamm -- 9/19/2007, 4:13 pm
Re: Strip: hatches
John Schroeder -- 9/18/2007, 10:25 pm
Re: Strip: hatches
Bill Hamm -- 9/19/2007, 4:41 am
Re: Strip: hatches
Bill Hamm -- 9/19/2007, 1:32 am
Re: Strip: hatches
Mike Savage -- 9/19/2007, 6:40 am
Re: Strip: hatches
Bill Hamm -- 9/19/2007, 1:32 am
Re: Strip: hatches
John D. -- 9/19/2007, 4:14 pm
Re: Strip: hatches
Bill Hamm -- 9/20/2007, 10:00 am
PS
Charles Robinson -- 9/18/2007, 9:30 am
Re: PS
Pedro Almeida -- 9/21/2007, 5:34 pm
Re: PS *LINK* *Pic*
Justin L. -- 9/22/2007, 9:48 pm
Re: PS *LINK*
Bob Kayes -- 9/18/2007, 2:03 pm
Re: Strip: hatches
Don Goss -- 9/17/2007, 9:35 pm
Re: Strip: hatches
Mike Savage -- 9/17/2007, 6:45 pm