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According to Rule 11 — Application, which statement is correct?
A
Collision risk may still exist, especially when approaching a very large vessel, a tow, or a vessel at close range.
B
Do not be afraid to reduce speed, stop or reverse if that is the safest action.
C
When using radar, check the effectiveness of the avoiding action until the other vessel is finally past and clear.
D
Two vessels are "in sight" when one can be observed visually from the other.