Furuno 1933C Manual page 37

RADAR OPERATION
C r o s s i n g S i t u a t i o n R a d a r D
C r o s s i n g S i t u a t i o n R a d a r D
In the following screen capture from a SINS Radar display, we will show a vessel progression on the radar scope for determining a crossing situation. You are
on a course of 000°T. You are underway but maintaining station (drifting). You are in a crossing situation with the other vessel. The white arrow represents the
relative motion line (RML) line for the vessels. The white arrow will not be indicated on the radar scope. (4 images total)
Three minutes later, acquire the contact again and Mark as
3
"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 in crossing situation.
i s p l a y ( c o n t . )
i s p l a y ( c o n t . )
Three minutes later, acquire the contact again and Mark as
4
"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 in a crossing situation. It is
crossing well ahead of you and as long as you continue to
drift there is low risk of collision.
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