Which statement correctly describes Relative Motion Mode?

Which statement correctly describes Relative Motion Mode?

• A. The own ship will move across the screen as it is actually moving
• B. A user-directed graphical circle tool indicates range
• C. The own ship stays in the center, other contacts move in relation to own ship
• D. The processor automatically tracks returns

Answer: (C)

In Relative Motion Mode, the own ship is fixed at the center of the radar display while all other targets move on the screen relative to that fixed position. This lets you see how other vessels are moving with respect to your ship—how their range and bearing change as you and they move. It’s about the apparent motion of targets caused by their movement relative to you, not by your own ship appearing to slide across the screen. This is why the statement describing the own ship staying in the center and other contacts moving in relation to it is the best fit for Relative Motion Mode. It contrasts with modes where the own ship itself moves across the display as if you’re actually traveling (true motion), or displays that involve other features like range tools or automatic tracking, which aren’t defining characteristics of RM.

In Relative Motion Mode, the own ship is fixed at the center of the radar display while all other targets move on the screen relative to that fixed position. This lets you see how other vessels are moving with respect to your ship—how their range and bearing change as you and they move. It’s about the apparent motion of targets caused by their movement relative to you, not by your own ship appearing to slide across the screen.

This is why the statement describing the own ship staying in the center and other contacts moving in relation to it is the best fit for Relative Motion Mode. It contrasts with modes where the own ship itself moves across the display as if you’re actually traveling (true motion), or displays that involve other features like range tools or automatic tracking, which aren’t defining characteristics of RM.