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Published online by Cambridge University Press: 18 January 2010
In the discussion on the theory and practice of collision avoidance, two areas have been particularly liable to dispute, namely the rules for direction of manoeuvre and for responsibility for manoeuvre. Where two craft meet, some propose a rule of manoeuvre direction fixed by relative bearing, others a flexible rule designed to increase initial miss distance. Some think both craft should manoeuvre (dual responsibility), others only one (single responsibility).