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1. OPERATION
1-28
1.9 Regional Operating Channels
AIS operates primarily on two dedicated VHF channels, CH 2087 and CH2088.
Where these channels are not available regionally, the AIS is capable of being
automatically switched to designated alternate channels by means of a
message from a shore facility. Where no shore based AIS or GMDSS sea area
A1 station is in place, the AIS should be switched manually as in paragraph
1.9.2.
A regional operating area is set with the procedure shown below. The most
recent eight areas are memorized.
• Automatic setting of VHF DSC (channel 70) from shore-based AIS
• Automatic setting by AIS message from shore-based AIS
• Setting by shipboard system such as ECDIS
• Manual setting
The default area is as follows:
• Tx power: 12.5 W
• Channel no. 2087, 2088
• Frequency bandwidth: 25 kHz
• Tx/Rx mode: Tx/Rx
1.9.1 Viewing channels, Tx power
Do the following to view current channels.
1. Press the MENU key to open the menu.
2. Choose CHANNEL SETTINGS and then press the ENT key.
QUIT[MENU]
[CHANNEL SETTINGS]
VIEW CHANNEL
EDIT CHANNEL
CHANNEL SETTINGS menu
3. Choose VIEW CHANNEL and then press the ENT key.
[VIEW CHANNEL]
POWER : 12.5W
CHANNEL NO.
CH-A: 2087
CH-B: 2088
Power
Channel
QUIT[MENU]
VIEW CHANNEL display
4. Press the DISP key to close the display.