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Preventing Compas Interferance?

Old 12-11-2002, 06:26 AM
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Default Preventing Compas Interferance?

I posted similar post on the main forum then thought it would be a better question for here.

I'll be laying out a new boat soon.

When mounting electronics on a boat, other than distance and twisting the power leads to electronic equipment, what else can be done to prevent/minimize compass interferance?

Seems like most electronic equipment manufacturers want you to keep the stuff away from the compass, yet on most trailerable boats it would be difficult to mount anything that far from the compass.

Given the following list of equipment which should be mounted furthest from the compass? (Flush mount in dash panel below compass).

LCD Radar
LCD Fishfinder
LCD Chartplotter
VHF Radio
Auto pilot control
Engine Insturmentation (tach, fuel, batt...)
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Old 12-11-2002, 07:02 AM
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Default Preventing Compas Interferance?

Your VHF radio has a magnet in the speaker so that should probably be the furthest. Do not bother to do the compass calibration until all the electronics are mounted.
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Old 12-11-2002, 10:40 AM
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Default Preventing Compas Interferance?

Great list, but where is the GPS? [img]/infopop/emoticons/icon_frown.gif[/img] I have my VHF radio right below the compass, NO problem; although the point is well taken. Keep the radio speakers away too. While one should never depend entirely on the GPS for navigation the compass will continue to take a lesser role. In general I do not thiink you have any mounting problems. I would also keep the antennas as far away as practical. I have no noticeable interference on my compass from any piece of electronics...but check it against the new GPS! [img]/infopop/emoticons/icon_wink.gif[/img]
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Old 12-11-2002, 03:53 PM
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Default Preventing Compas Interferance?

Should have said GPS/Chartplotter (Garmin 2006C)
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Old 12-11-2002, 05:41 PM
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Default Preventing Compas Interferance?

Cohomike,
Before mounting the compass or instruments, sit the compass near something relative to heading. Move each new instrument around and near the compass, observe effect. That will let you know where you stand and how far each unit will have to be from the compass. It is almost impossible with space at a premium to avoid some minor deviation due to proximity of instruments. As mentioned above, speakers are the worst offenders. If you really want to make everything compact, you may need to use a
digital remote sensing compass.
Good Luck
Joe

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Old 12-12-2002, 04:16 AM
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Default Preventing Compas Interferance?

Thanks gang, feeling much better about this now.
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Old 12-12-2002, 03:14 PM
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Default Preventing Compas Interferance?

If all else fails you can get the compass adjusted by a professional adjuster.
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