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risk of collision Collision risk is addressed in Rule 7. The un-stated implication is that collision risk exists if two approaching vessels would arrive at the same place at the same time if they continue on with their present speeds and courses. The Rule requires evaluation of this situation using compass bearings. This situation could exist, however, when the vessels are still separated by a great distance, large enough that in a practical sense there is no risk of collision yet. Hence when does the risk begin which triggers the actions required by the Rules?

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