before anything i would get some basic boat esentials ,an anchor and a couple of meters of chain , 30 metres of line or 5 times the depth of water you will be operating in ,a small bucket or bailer, you could even keep the anchor and line in it ,and a decent set of oars or paddles ,and thats just the very basic stuff,plus lifejackets for each person , if going to open water or the sea some hand flares and a whistle and torch ...most inland rivers/ canals are controled by british waterways and there is a fee to pay about £5 a day,if you get caught without its £10.or double the day fee, up to a couple of years ago max power limit for canals was 4 hp and rivers 10 hp for small craft and you cannot use locks with a day permit ,,highly unlikey in your case lol .the problem is that everyone will have rightly or wrongly a different view on what to have or should have .but even without an engine on i personaly would not use a boat without the basic stuff .
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