Raymarine SR100 - Manual (Page 7)

Safety notices 4
CAUTION
In line fuse
If you do not have a breaker in the power circuit, an in line
2A slow blow fuse should be fitted to the positive (red)
lead of the power cable.
CAUTION
Grounding
This system is not intended for use on ‘positive’ ground
boats. The power cable earth screen must be connected to
the boat’s RF ground system.
CAUTION
Software upgrade
While this software upgrade is not intended to erase data
stored in your displays internal memory, it is strongly
recommended that you perform a backup before
upgrading software should anything interrupt the
upgrade process.
CAUTION
Power supply
Always turn your weather system OFF before carrying out
routine maintenance.