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Subject: Re: TWL: redundant instruments
From: David P. Ross (ross@XXX.XXX)
Date: Fri Mar 01 2002 - 11:09:00 EST
Jim Alexander wrote>>>>My question relates to having the ability to switch
GPS data to the other
instruments, autopilot, etc. so that I can use either the Northstar or the
Garmin for navigation functions as well as to have a back up in the event
either GPS receiver would fail.
Anyone have a set up like this or know how to wire it through a selector
switch or some other way of accomplishing this?<<<<
I currently switch NMEA data from three GPS's and one LORAN into my
chartplotter and the outputs of a handheld GPS, a fishfinder/GPS head, and
the chartplotter to my autopilot. NMEA requires two wires, so a DP switch
is required. I bought rotary switches from Radio Shack, put 'em in a little
box at the helm, wired the switches to a terminal strip with flat data
cable, and now can mix and match. I find that my GPS receivers sometimes do
get squirrelly, but usually not at the same time, so I just throw the
switch.
Dave and Marie Ross
Miss Jackie II
Tiger 41 Sundeck
Reston, Virginia
Docked in Marathon, Florida
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