Originally Posted by Palarran
Noelex, power for me isn't a really big issue. Do you know if you can make a small plotter like that a slave of the main unit? Where if you change the main one it is reflected on the small one and vise versa? I can turn the brilliance down on my main unit to conserve some power.
If power isn’t a problem running the chartplotter
with separate cheap
alarm may be best solution.
If, however, you install a separate GPS
like the Furuno
Gp-32 that I have by my bed
you will have extra redundancy, and it can communicate and send the GPS position to the chartplotter
if the main GPS fails. It is not possible to link things like brilliance between the units. You would have to adjust the brightness on each unit separately, but important information like position and speed will be shared. Normally I use either the chartplotter or the GP-32 rather than both units at once.
At night I turn off the main chartplotter and use the 32 visible from the bed
(with anchor alarm)
Turning down the brightness on a chart;plotter will have a major influence on its power consumption
., but if you are using a simple B&W GPS like the Furuno
GP-32 the brightness has little impact on its power draw. Full dim on the 32 is about 0.17A and full brightness is about 0.22A.
Chartplotters vary enormously in their power consumption
between models but 1.2A on full dim to 2.8A on full brightness would be average for a small plotter.
I am feel a separate GPS next to the bed is the best solution as it provides redundancy, low power
consumption, you can see the boats position, and it avoids the problem of external alarms interfering, or damaging the main GPS.
I spend almost 365 days a year at anchor so your priorities may be different, but to me the small additional cost of a GPS visible from where I sleep has been one of the best improvements I have made to the Yacht.