User's Manual

20
a 4mm Allen key to tighten the bolts. If the rear of the mounting surface is inaccessible,
use the self-tapping screws supplied. Always fit washers under heads of the screws to
avoid damaging the plastic.
9.3 Mounting instruction plate
The G4 is supplied with a rigid plate giving visual instructions on how to operate the G4
in an emergency. Mount this next to your EPIRB as explained in section 8.3.
9.4 Marking HRU expiry
If you are installing a float-free G4 you
must
now mark the HRU expiry date. The HRU
has a 2 year in-service life which starts as soon as it gets exposure to a marine
environment. Hence the 2 years starts at installation and it is left to the customer to
mark this date during installation. A date 2 years into the future should be marked on
the HRU body and copied onto the label on the side of the enclosure. The HRU is
marked by cutting out the corresponding dates on its label. The enclosure should be
marked using the alpha-numeric stickers provided, then covering them with the clear
sticky label provided (but see 9.5 first). The preferred date format is month and year,
for example : JUN 2001.
150mm
(5.9")
84mm (3.3")
44mm
(1.73")
104mm
(4.1")
150mm
(5.9")
440mm
(17.3")
140mm
(5.5")
OBSTRUCTION FREE AREA
0.8m x 0.5m (32" x 20")