Uniden HH979XL - Manual (Page 20)

This will be followed on air by an automatic voice announce­
ment declaring "Attention all ships, emergency call
received, please stand by for Sydney Radio”,
The Seaphone channel you are using will also be automati­
cally switched to 'lalk through repeater mode". This means
that your signals are instantly rebroadcast from the VHP
base station antenna enabling any other vessels listening on
the channel to respond and standby to render assistance as
advised by the operator and the appropriate search and
rescueorganisatlon.
Cautionary Note:
The effective range and strength ot ship-to-shore and ship-
to-ship VHP transmission varies greatly depending on the
quality of individual radio Installations, height of the antenna
and the vessels location. (As VHP is essentially a line of
sight medium, signals can be greatly interrupted by high
terrain in sheltered waterways and inlets).
In addition, volume and signal strength of other traffic and
channel capacity in a particular location can impact on the
timing and/or success ot establishing a radio link.
If any of these factors apply to your vessel you may not
succeed in making contact when you first activate the "999"
Seaphone facility. In these circumstances you should
continue to repeat the procedure outlined above, selecting
an alternative Seaphone channel if necessary.
HH979XL Page 18