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3.16.6 Diagnostics
Certain diagnostics information is provided to assist with installation and maintenance of the transceiver. This
can be accessed via the Maintenance menu. Figure 29 shows the diagnostics menu page. A number of
features can be accessed via the diagnostics menu:
● Internal GPS status provides GPS lock status, number of satellites in view and in use and the mode of
use.
● ADC and VSWR data provides internal system information for use in installation and maintenance
only.
● Sensor port status provides details of sensor port settings.
Figure 29 Diagnostics menu
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 4.5.3) and the
navigation status is set to 'Moored' (see section 4.5.3) 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.
13:20:47
OK
DIAGNOSTICS:
INTERNAL GPS STATUS
ADC and VSWR
SENSOR PORT STATUS
Decline
13:20:47
OK
TANKER MODE:
Entering Tanker Mode
Transmit Power is
Low Power (1W )
Ack nowledge
INT
GPS
Respond
INT
GPS
Operation
Page 29
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