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Operation
3.17 Tanker mode
To comply with ISGOTT International Safety Guide for Oil Tankers & Terminals a 1W transmission mode is
provided in the AIS transceiver. When the vessel type is defined as a tanker (see section 4.5.4) and the
navigation status is set to 'Moored' (see section 4.5.4) then the transmitter power will be automatically reduced
to 1W. An acknowledgement screen as shown in Figure 30 is displayed when this set of conditions is met. A
'1W' icon is displayed in the status bar when tanker mode is enabled (see section 3.3).
Figure 30 Tanker mode entry acknowledgement screen
This mode is automatically disabled if the vessel type or navigation status conditions no longer apply. An
acknowledgement screen similar to Figure 31 is displayed when tanker mode has been disabled. Tanker mode
is also disabled if the vessel speed exceeds 3 knots as it is assumed that the vessel is no longer moored above
this speed. In this case the navigation status should be adjusted appropriately and a prompt is displayed as
shown in Figure 31. Selecting the 'Change' option will display the voyage data settings where the navigation
status can be updated.
Figure 31 Tanker mode exit screen when speed exceeds 3 knots
3.18 Units display - speed and distance
When operating in Class A (SOLAS) mode the default units for speed and distance are knots (kn) and nautical
miles (nm) respectively.
When operating in Inland AIS mode the default units for speed and distance are kilometers per hour (km/h) and
kilometers (km).
It is possible to override the default units through the 'User settings' menu. Press the menu key and then select
'User settings' followed by 'Units'. You can now select either nautical or metric display of speed and distance
regardless of the AIS mode.
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13:20:47
OK
TANKER MODE:
Entering Tanker Mode
Transmit Power is
Low Power (1W )
Ack nowledge
13:20:47
OK
TANKER MODE:
Exiting Tanker Mode
Transmit Power is
High Power (12.5W )
Change Nav. Status?
( Currently moored )
Back
INT
GPS
INT
GPS
Change
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