In relative motion mode, how are the own ship and contacts represented on the radar display?

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In relative motion mode, the own ship serves as the reference point on the radar display and is shown fixed at the center. All other contacts are drawn with motion relative to that reference, so they drift around the own-ship symbol according to their bearing and range from you. This framing lets you judge how targets are moving in relation to your vessel—whether they’re closing in, crossing your path, or falling behind—by watching their relative motion on the screen. If you change course or speed, the display updates to keep your ship as the fixed reference, while the other contacts continue to move relative to it. This is why the own ship remains fixed and all other contacts move relative to it.