Definition
A position placed well offshore in deep water and clear of dangers, from which the approach to the coast begins. It is chosen so that the first expected sighting, a powerful light, a radar-conspicuous headland or a landfall buoy, can be identified and confirmed before committing to the entry. Approaching down a charted leading line, or deliberately offset to one side so the direction of error is known, is safer than aiming at the entrance itself.
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