Raytheon NSC 18 User Manual page 54

Relative Motion without TRAILS
If no trails (set 2) are activated, the RM (R) and RM (T) are identical.
Set 1 Set 2
3748DOC020102
Operator Manual
Set 1
Buoy
Ship in motion
Figure: 2−19 Relative Motion without TRAILS
2−36
Set 2
Edition: 14.JAN.2005