VHF Marine Radio Protocols
Operating Your Radio
27
Nothing
Comes Close to a Cobra
®
Standby/Receive
and Transmit
Standby/Receive and Transmit
•
Marine Standby and Receive (Rx) Mode
Marine Standby
mode is the default mode for the radio whenever it is turned on.
From this mode, you can change current settings by becoming familiar with the
different key functions in
Marine Standby
mode. While in
Marine Standby
mode,
the user will be able to transmit by pressing the
Push to Talk (Talk)
button. Signals in
Receive (Rx)
mode will be received on the selected channel(s).
NOTE
Coastguard alerts are broadcast on Channel 16. While in
Marine Standby
mode,
you will receive any messages sent on the channel to which you are tuned.
Transmit (Tx) Mode
Transmit (Tx)
mode gives you the ability to interact with
safety services, other vessels and shore stations. When you
use this capability, be sure to follow the procedures and to
observe the courtesies that govern its use so everyone
benefits. See Appendix to help you select the proper channels.
To Transmit a Message:
1.
Check to see that your radio is set to a proper channel
for the type of message you plan to send.
2.
Toggle to the
Low Power
setting.
3.
With the microphone about 5.0 cm [2 in.] from your
mouth, press and hold the
Talk
button and speak into
the microphone. The
Transmit
icon will appear on
the LCD.
4.
Release the
Talk
button when you are finished
speaking. Your radio can only operate in either
Transmit (Tx)
or
Receive (Rx)
mode at any given time.
You will not hear the response to your message unless
the
Talk
button is released. If the
Battery Power
icon
begins blinking on the LCD when the
Talk
button is
pressed, the radio will NOT transmit.
NOTE
If the
Talk
button is held down for five (5) minutes,
the radio will automatically sound a series of beeps
and cease transmitting to prevent unwanted signal
generation and battery drain. As soon as the
Talk
button is released, it can be pressed again to
resume transmission.
26 English
VHF Marine Radio Protocols
Operating Your Radio
Advanced Operation
Low Power Mode
Check Channel Number
Talk Button
Transmit (Tx)/Receive (Rx) Icons
Advanced Operation
•
Channel 16 Mode
Channel 16
mode gives you quick access to calling on
Channel 16 from any operational mode.
To Switch to Channel 16:
1.
Press the
Channel 16
button to change to
Channel 16.
2.
Press the
Channel 16
button a second time and
return to the last used
Standby
channel.
Channel 16 Button
Channel 16
Tri-Watch Mode
Tri-Watch
mode gives you one (1) button access to scan
a total of three (3) channels of most importance to you.
Channel 16 is preprogrammed and will always be one (1)
of the scanned locations. Two (2) other channels of your
choice can be stored in the radio. These channels can be
edited and/or recalled during future engagements of
Tri-Watch
mode.
NOTE
The radio must be squelched for
Tri-Watch
mode to
function. See page 18 for
Squelch
procedure.
Tri-Watch Setup
To Program or Edit the Tri-Watch Channels:
1.
Press and hold the
TRI-WATCH
button for two (2)
seconds to activate
Tri-Watch Setup
mode. The
TRI
and
MEM
icons on the display will turn On.
NOTE
The main channel number will flash to indicate channel
position. If there is no input activity for 15 seconds, the
radio will sound two (2) beeps and return to
Marine
Standby
mode.
TRI-WATCH Button
TRI and MEM Icons
MRHH475EU_MANL_vC.qx:MRHH475_ENG_Body 12/28/09 9:44 AM Page 26
