Which stabilization is best for collision avoidance?

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Stabilization on a radar display is how the system compensates for the ship’s own motion so the picture of other vessels stays meaningful as you move through waves. For collision avoidance, you need a picture where relative motion is easy to read and reliable, even in rough seas. Sea stabilization cancels out the ship’s roll and pitch relative to the sea surface, keeping the display steady as the vessel moves with the waves. That stability makes it easier to see how another ship is actually approaching you—the bearings and ranges change in a way that reflects true relative motion, helping you judge closing rates and whether you’re on a collision course and what maneuver might be needed.

Ground stabilization keeps the display aligned with a fixed geographic reference, but the picture can still be affected by the vessel’s motion, making target symbols appear to wobble. That wobble can complicate interpretation of a target’s true motion and timing for avoidance. Lost track indication is about whether a target is being tracked, not about how the display is stabilized.

So, using sea stabilization provides the clearest, most reliable view of how another vessel is moving relative to you, which is why it’s favored for collision avoidance.