Operating Manual

89-042 Issue 5 17
3.18 VHF Regions Menu
UAIS works on two radio channels at any time and may select those channels
depending on the geographical area. A list of up to 10 regions with their associated
channels can be stored in the permanent memory; if not in any of these regions,
UAIS uses the default channels of 2087 and 2088.
To view the region list stored in memory, select VHF regions option from the Main
set-up menu. The top item as highlighted above) indicates the frequencies used
outside the specified regions (ie at sea). Successive items, where present, show
manually entered frequencies and their parameters (eg transmitter power). The
station uses these entered frequencies within that specific region. “R” indicates the
frequency is used for receiving, similarly “T” is for transmitting.
Information on a particular region is shown at the top of the screen: geographical
co-ordinates, bandwidth and power of transmitter and time of entering or leaving the
region.
There are several ways a station can acquire region information: -
From a base station on the AIS channels.
From external devices through the input interfaces.
From a coastal station on CH70 DSC.
From an operator using the VDU.