On Fri, 14 Jul 2006 20:38:39 GMT, Cecil Moore
wrote:

Al Klein wrote:
Transmitters that use GPS-derived data aren't GPS-based systems, ...

Huh???? Can you prove that assertion? :-)

The notification systems are radio-based. Notification isn't made by
GPS. We had radio-based notification systems long before we had the
GPS.

If one was away from the shipping lanes,
one was SOL or USCWAP. However, if one was in the shipping
lanes with a flare, one at least had a chance of being
rescued.

Once flares had been invented. We've been sailing the seas for at
least 4,000 years, over 3,500 of them without radios, flares or other
means of communications to ships or land installations we couldn't
already see.