When you are actually navigating you want multiple sources of data to coincide. When they don't it is actually time to stop, until you can determine if it is safe to proceed.
Garmin products are very popular (good marketing) but Garmin is not a company with nautical roots. What they offer has often contained subtle but dangerous flaws or omissions when taken to sea. They also lack the level integration necessary to fit seamlessly into the compliment of modern marine electronics. I agree a magnet is really stupid. Actually I guess the real violation is a magnet in a hand held of moveable object. A fixed magnetic source, as long as it is reasonable distance from the compass can be compensated for when the compass is swung. Easy when the compass is electronic but not so much when it is traditional. Phil Agur s/v Wing Tip <http://www.catalina27.org/public_pages/profile270.htm> Secretary, Call Sign WCW3485 IC27/270A MMSI 366901790 www.catalina27.org Vessel Doc# 1039809 -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of James Calleran Sent: Monday, June 16, 2008 8:05 AM To: [email protected] Subject: Re: catalina27-talk: GPS Compass aside, a magnet doesn't affect the SD card? jc --- On Mon, 6/16/08, Don Brooks <[EMAIL PROTECTED]> wrote: On the face of the Garmin 440 there is a small door for the SD card. This door has a piece of rubber to make it water tight and is held closed by a magnet. A thumb screw or plastic clip would have done the job, but a magnet is really stupid.
