Standard Horizon Marine Tranciever GX1255S Operating Instructions

GX1255S5.10  POSITION INDICATION
The transceiver has the ability to display the vessel’s position (LAT/LON) for
Confirmation of the data, if connected to a GPS receiver.
1.Press and hold the H/L key, displays
“LAT” and “LON” information alternately
every two seconds.
If the GPS receiver receives no signal,
the display will be as shown in the illus-
tration.
2.To hide the position information, press and hold the H/L
key again.
5.11  TIME INDICATION
When press and hold the 16/9 and H/L keys while turn the...

GX1255SPage 206  DIGITAL SELECTIVE CALLING
6.1  GENERAL6.1.1  Digital Selective Calling (
DSC)
Digital Selective Calling is a semi-automated method of establishing a radio
call, it has been designated by the International Maritime Organization (IMO)
as an international standard for establishing VHF, MF and HF radio calls. It
had also been designated as part of the Global Maritime Distress and Safety
System (GMDSS). It is planned that DSC will eventually replace aural watches
on distress frequencies and...

GX1255S6.2  SENDING A DISTRESS CALL
The distress call automatically includes the vessel’s DSC MMSI and Lat/
Lon position. Refer to section 7.9 (USER MMSI INPUT). The vessel’s posi-
tion can be sent only if the transceiver is properly connected to an operating
GPS receiver.
1.Lift the red spring loaded DISTRESS cover and press
the DISTRESS key. The “DISTRESS” icon will appear
on the LCD.
2.Press and hold the DISTRESS key. The LCD will count
down (3, 2, 1) following this the QUEST will transmit the...

GX1255SPage 22 6.3  SENDING AN INDIVIDUAL CALL
This feature allows the user to contact another user vessel DSC and to
automatically switch the receiving DSC radio to a desired working channel.
This feature is similar to calling a vessel on CH16 and requesting to go to a
another channel. To send an individual call, see section 7.5 INDIVIDUAL
DIRECTORY SETUP and 7.11 USER MMSI INPUT. The individual call func-
tion allows you to transmit a DSC signal to a specific party only, prompting
communication on a...

GX1255S6.4  SENDING AN ALL SHIPS CALL
The All Ships Call function allows contact to be established with other vessel
stations without having their ID in the individual calling directory.
Also, priority for the call can be designated as Urgency, Safety or Routine.
URGENCY Call:This type of call is used when a vessel may not truly be in
distress, but have a potential problem that may lead to a
distress situation (PAN, PAN,Call Type).
SAFETY Call:Used to transmit boating safety information to other ves-...

GX1255SPage 24 6.5  RECEIVING DSC CALLS
Several types of DSC transmissions can be received. The required action
depends on the particular DSC type as outlined in the following examples.
NOTE
If the radio is receiving on a working channel or transmitting on a work-
ing channel, DSC calls will not be received.6.5.1  Receiving a distress call
1.A distress call is received. “RECEIVED DISTRESS” will
appear on the LCD, and an emergency alarm will be
heard.
Channel 16 is automatically selected.
2.Press any key...

GX1255S6.5.3  Receiving an all ships call
1.An all ships call is received. “RECEIVED ALL SHIPS”
will appear on the LCD, and an emergency alarm will be
heard.
Channel 16 is automatically selected.
2.Press any key to stop the alarm.
3.Press the UP or DOWN key to select the receiving dis-
tress data:
•MMSI or Station Name
4.Monitor channel 16 or traffic channel until the communi-
cation is completed.6.5.4  Receiving a geographical area call
1.A geographical call is received. “RECEIVED GEO-
GRAPHIC” will...

GX1255SPage 266.5.5  Receiving an individual call
When receiving an individual call, an acknowledgment must be sent back to
the calling station. Please refer to a selection in the 7.DSC/RADIO SETUP
MODE that allows the acknowledgment to be transmitted manually or auto-
matically. Refer to 7.8 INDIVIDUAL REPLY and 7.9 INDIVIDUAL ACK sec-
tions for details.
Automatic Reply:
1.An individual call is received. “RECEIVED INDIVIDUAL”
will appear on the LCD, and an individual call alarm
sounds. Then the radio...

GX1255S6.5.6  Receiving a position request
When position request call is received from another vessel, a calling alarm
will sound. Please refer to section 7.DSC/RADIO SETUP MODE that allows
the position request to be transmitted manually or automatically. Refer to
7.11  POSITION REQUEST REPLY section for details.
Automatic Reply:
1.When a position request call is received, “RECEIVED
POS REQUEST” will appear on the LCD, and a calling
alarm will sound.
2.Press the any key to disable the calling alarm, then...

GX1255SPage 287.  DSC / RADIO SETUP MODE
7.1  LAMP ADJUSTING
1.Press and hold down the CALL/SET key until “RADIO
SETUP” appears.
2.Press the CALL/SET key to select “LAMP.”
3.Press the CALL/SET key to enable adjusting this item
(The number in the display will flash).
4.Press the UP or DOWN key to select the desired level.
3:High
2:Mid
1:Low
0:OFF
5.Press the CALL/SET key to store the selected level.
6.Press the DOWN key to select “EXIT,” then press the
CALL/SET key.
7.Press the DOWN key to select “EXIT,”...