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Evenin' Lads!

It's that inexperienced old Geezer from West Wales again!

I was readin' this 'ere book today, about using GPS. Useful information I
thought, 'til I got to the bit where it says, "Don't connect your GPS to the same
battery that you use to start your engine, 'cos the starting current often
causes your GPS to re-set, thereby losing all your stored Data!" Can any of you
Blokes comment please? Does this really happen? ( If this does happen, shouldn't
companies like Orkney get a slapped wrist for supplying Boats with everything
running off one battery?)

VL
:confused:
 

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Doesn't happen on mine. I have a Navman 5500, Garmin 126 and Furuno gp30 and they are all fine off the same battery I have to start the engine.
 

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I think the advice you got is kind of blurred in the translation.

Most GPS systems are happy to work at voltages between 9 and 18 volt. If your battery is on the small side for the engine or on it's way out as it cranks the engine the gps can go below the lower voltage so it shuts itself down. You have to press the on button once the engine starts. If this happens of course the gps will have lost it's fix. All internal data and waypoints will be preserved as there is an internal battery to power the eprom where the data is stored.

If this is happening on your boat it is a tip that your battery is too small or is on i's way out.
 
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