User's Manual

6
4 DESCRIPTION
The G4 is a powerful self-contained distress transmitter. It is powered by a light weight
Lithium battery that has a replacement interval of 5 years. An EPIRB is intended to be
a one-shot device; once activated it can operate for at least 48 hours. It operates best
while floating in water, but it can also be operated while on board or in a liferaft.
Refering to the previous figure, the key components of your G4 are as follows:
Antenna This is a flexible whip. It must be near vertical when
operating.
If the antenna gets bent, gently straighten it out.
Strobe light This is the glass U-tube visible through the clear lens dome.
When the G4 is activated this will flash every few seconds.
Red lamp Visible through the clear lens dome at the rear of the G4.
This stays on or flashes to show you which mode you are
in.
Green lamp This flashes when the GPS gets a position fix.
Program point A dimple in the clear dome, through which your supplier can
optically input the coded message unique to your G4.
You
must
register the coded message with local
authorities.
READY button Press this key once to de-activate the G4. Hold it down to
run the built-in self-test, which checks basic operation.
ON button Press this key to activate the G4 manually. The key is
protected by a sliding door which is fitted with a tamper
seal.
Sea switch The two screw heads below the keys are sea switch
contacts. Submerge these in water to automatically activate
the G4.
Lanyard Pull the lanyard spool down to free it. Use the cord to tether
the G4 to a survival craft.
Never
tie the G4 to your vessel.
4.1 Wall bracket
If you purchased the manually activated version (G4m), this is normally supplied with a
wall mounting bracket (see section 8). The bracket is made from white plastic so it will
not rust. Its top section is sprung loaded, so that one simple squeeze will quickly
release the G4 allowing it to be carried to a liferaft. The wall bracket should be sited in
plain view near an emergency exit. This bracket is more than just a stowage point, it
contains a magnet which disarms the G4’s sea switch. If you do not stow the G4 in its
bracket, there is a risk of the G4 activating if it gets wet.