Operational Overview
The Navigation Tab
The Navigation tab gives an overview of the operational state of the system: the direction in which
the local unit is transmitting, whether it is locked to a Remote Station, and - if so – the detected
position and signal level. It also shows the configured scan limits and end limits of the local station.
If the system is not locked, it allows the user to search for the Remote Station either manually or
automatically.
The Navigation tab contains the following fields and controls:
Azimuth
- The horizontal angle of the Remote Station, relative to North or another reference
direction.
Bearing
- The horizontal angle of the Remote Station relative to the local station.
Heading
- The direction of the vessel relative to the reference direction used to define Azimuth.
Range
- The distance between the local and Remote Stations.
Signal Level
- The strength of the signal received from the Remote Station.
Local Station Model
– The version of the local Antenna Unit (e.g. Mk 6).
Station Type
– Whether the local station is Mobile or Fixed.
Operating Mode
–The current state of the local sensor (Operating, Standby or Idle).
Scan Limit Left and Scan Limit Right
- These define the horizontal sector in which the local
unit normally operates, and through which the antenna rotates when in Auto-Search mode (see
below). The Scan Left Limit sets the anti-clockwise edge of this sector and the Scan Right Limit
sets the clockwise edge, as represented by the dark blue area on the Bird’s Eye View.
Rotate Sensor
- Click on the left-arrowhead to move the antenna in an anti-clockwise direction
(repeat as necessary). Click on the right-arrowhead to move clockwise.
Enable Auto-Search
- After clicking this button, the antenna rotates to and fro between the
configured scan limits until it locks onto the Remote Station, or until
Disable Auto-Search
is
clicked.
Frequency Pair
- The fixed and mobile stations each transmit at a given frequency within the
9200-9300 MHz band. These frequencies are selected as a pair and if two Artemis systems are
to be used in close proximity they should be allocated different frequency pairs, in order to avoid
interference.
Tx Address Code
- The address code being transmitted by the local station (0-63).
Rx Address Code
- The address code received from the Remote Station (0-63).
Note also that a grey area on the Bird’s Eye View represents a sector into which the antenna
cannot rotate due to a physical obstruction. This is configured by means of the parameters
End
Limit Left
and
End Limit Right
.
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