Radar Observer · Display — Stabilization
A 'sea-stabilized' (water-stabilized) true-motion display moves own ship across the screen according to:
- AThe wind direction
- BCourse and speed over the ground from GPS
- CCourse and speed through the water (log/heading), so set and drift are not removed✓ Correct
- DThe depth under the keel
Explanation
Sea (water) stabilization drives own-ship motion from heading and log speed through the water, so a current makes fixed targets appear to drift. Ground stabilization uses course and speed over the ground (e.g., GPS), keeping fixed objects truly fixed — better for navigation, but for collision avoidance the relative picture is what matters.
Authority: Bowditch (Pub. No. 9); IMO Performance Standards
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