39
RADAR OPERATION
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In the following screen captures from a SINS Radar display, we will show another vessel’s progression on the radar scope for determining an
overtaking
situation. You are on a course of 000°T. You are underway, but maintaining station (drifting). You are being overtaken by the other vessel. The white arrow
represents the RML line for the vessel. This white arrow is for training purposes and will not be indicated on the radar scope.
(4 images total)
3
4
Three minutes later, acquire the contact again and Mark as
"M3" and put time in minutes acquired. The first and second
mark can still be faintly seen. The first, second, and third
mark will give you a better idea of the RML of the contact.
This RML indicates a contact that is overtaking your vessel.
Three minutes later, acquire the contact again and Mark as
"M4" and put time in minutes acquired. The first, second, and
third mark can still be faintly seen. The RML from M1 to M4
will give you a very good idea of the RML of the contact. This
RML indicates a contact that is overtaking your vessel. This
is also a constant bearing decreasing range (CBDR)
situation. The other vessel must stay clear of you.
