Really need a number of some sort, given that there are so many common names out there. Over 130 boats named Kingfisher- etc. Sail numbers are fine if they are registered. HOwever, all that is usually after the fact, and I agree that we have enough rules, we just never see anyone enforcing them. Auckland Harbour is like a washing machine at weekends, and I think the harbourmaster is probably well understaffed and underfunded.