"Obstruction An object that a boat could not pass without changing course substantially, if she were sailing directly towards it and one of her hull lengths from it.
If an obstruction does not become an "Obstruction" under the rules until you are one boat length away from it and realize you cannot avoid it, that is a little late to take evasive action; isn't it? I'm just wondering how that definition works in conjunction with the rule being discussed.
