USCG-ROR-L1.3

Definitions that differ: Rule 3, Rule 21 and Rule 22

USCG-ROR-M1 · Where the Inland Rules apply · USCG-ROR-M1-A Two rulebooks, the demarcation lines that divide them and the definitions that differ.

Inland adds **Western Rivers**, **Great Lakes** and a **special flashing light**, and drops the vessel constrained by her draft. Small words, large exam weight.

AI-drafted catalogue content pending SME review. The Rules of the Road examination is the one module where a near miss fails you, and module assignments and pass marks are set by NMC examination policy rather than regulation; verify with the National Maritime Center before booking an exam or relying on any figure here.