Users interested in Rulesmaster pro 4 full download generally download:
Get prepared for exams to acquire a commercial mariner's qualification or Yachtmaster or Coastal Skipper. Access a set of the International Regulations for Preventing Collisions at Sea (COLREGS), the US Navigation Rules (NavRules), the Canadian modifications to the Rules and IALA buoyage.
This practice tool is also a fun way to learn. There are flashcards on all the rules:
41 flashcards on Steering & Sailing Rules
63 flashcards on Lights & Shapes
25 flashcards on Sound & Light signals
and 13 flashcards on General Rules, such as...