User's Manual Part 2

Operator Manual
3−2
3748DOC020102 Edition: 14.JAN.2005
• Target Course
− TRUE > Direction of target movement referenced to true north.
− RELATIVE > Direction of target movement referenced to own ship bow.
• Closest Point of Approach (CPA)
The point at which a target will be closest to own ship
• Time to Closest Point of Approach (TCPA)
The time remaining to CPA, based on current own ship speed.
• Potential Collision Point (PCP)
The point at which a collision would take place if the target vessel maintains
present course and speed, and own ship maintains present speed and if own
ship were to choose to steer a collision course now.
• Radar Video presentation
Relative Motion (RM)
In this mode, the radar shows the motion of a target relative to the motion of
own ship, own ship is fixed on the screen. Targets move on the screen.
Relative Motion can be with True Trails RM (T) with Relative Trails RM (R)
True Motion (TM)
In this mode, the actual or true motion of a target and own ship, i.e. land
masses or non−moving targets are fixed on the screen while targets with
actual motion and own ship move on the screen (similar to plotting chart).