You have never raced a boat. Good. SailMOB drops you on a start line and shows you what "starboard" means before anyone yells it at you. The simulator shows you the rule; text only confirms what you already saw.
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Wind arrows, right-of-way markers, target-angle cones, laylines. Every rule turns up on screen as a picture first. You will feel who has to keep clear before you can name the rule.
Windward, leeward, mark-room, VMG. The words show up right when they matter, in plain English, tied to what is happening in front of you. No rulebook homework to get started.
Blow the start, foul a boat, miss the mark. Nobody is watching and nothing is at stake. Do it again until the call comes easy. Free, in your browser, no boat required.
The fastest way to learn the rules is to sail them, get one wrong, and see why.
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