User's Manual

l
19
Tracking Overview
When an Artemis-equipped vessel moves within operating range of a remote station, the
two stations will lock on to each other if the following conditions are met:
• The correct remote station has been selected within the vessel’s Artemis Control Software
(see
Selecting a Remote Station on page 20).
• The radar beams from both stations are illuminating the other.
In order to fulfil the second condition, the scan sectors of each station should be set up to
include the direction in which the other is located. In the case of a fixed station mounted
on a rig or on land, it should already be configured to search in the directions from which
vessels normally approach. For the mobile station on board a vessel, it may be necessary
to widen the scan sector in order to find the fixed station (see
Adjusting the Scan Sector
on page 21).
In order to locate the remote station within the scan sector, the beam direction can be
altered either manually or automatically:
• Rotate the beam manually using the rocker switch on the side bar. Click the left-hand
side of the switch to move the beam in a counter-clockwise direction by a small amount.
Similarly, click the right-hand side to move in a clockwise direction. Click repeatedly or
hold the switch down to move further.
• Click the Enable button embedded within the Auto Search button in order to search
automatically. This causes the beam to sweep from side to side across the scan sector
until it locks onto the remote station, or until Auto Search is disabled.
When the stations are locked, the remote station is represented on the BEV by a yellow
dot, the size of which varies with the strength of the received signal. If the remote station
has a structure type of Floating, an outline of its vessel is shown (with its bow aligned to 0°
azimuth).
Once a lock has been achieved, DP feed messages are output via the configured DP
channel(s). The position of the remote station and its signal strength are displayed at the
top of the side bar (or on the main screen if Coordinates Layout Mode has been selected).
(see
Tracking Information Quality on page 22).
Leaving Auto Search enabled on the local station causes the beam to search for the remote
station if it is lost (e.g. due to another vessel passing across the line of sight).
If the local vessel is station keeping, or is moving along a trajectory such that the bearing
of the remote station remains about the same, you may wish to narrow the scan sector
around the remote station. The advantage of this is to reduce the time required to find the
remote station again after losing it.