Navlines locked to ground stabilization will drift when ARPA is switched to sea stabilization. What happens to them?

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Multiple Choice

Navlines locked to ground stabilization will drift when ARPA is switched to sea stabilization. What happens to them?

Navlines tied to ground stabilization are anchored to the geographic frame (fixed to the earth). When you switch ARPA to sea stabilization, the display’s reference frame shifts to the ship’s own heading. Because the navlines were locked to the earth reference, they no longer stay fixed on the screen when the frame changes. As a result, those ground-anchored lines drift across the display relative to the ship’s heading. They don’t vanish and they don’t suddenly lock to the ship’s heading; they simply lose their ground stability and move as the stabilization frame changes.

Navlines tied to ground stabilization are anchored to the geographic frame (fixed to the earth). When you switch ARPA to sea stabilization, the display’s reference frame shifts to the ship’s own heading. Because the navlines were locked to the earth reference, they no longer stay fixed on the screen when the frame changes. As a result, those ground-anchored lines drift across the display relative to the ship’s heading. They don’t vanish and they don’t suddenly lock to the ship’s heading; they simply lose their ground stability and move as the stabilization frame changes.

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