Overall pretty good
Good way to go about learning the rules as they’re broken down into sections in a way that could assist in learning them by heart better. The pictures and overall layout is nice and the UI is simple and effective. Lights observations, the wording could be a lot better for some of these, missing out some crucial aspects on how we should formulate proper answers to orals questions for UK exams at least. There should be more situational questions that would be framed in the same way you would expect in an orals exam e.g identify vessel, identify the situation, identify the action and under which rule you are taking action.