Inland · Rule 18
Responsibilities Between Vessels
TL;DR
The pecking order: NUC > RAM > CBD (international only) > fishing > sailing > power-driven. Each must keep out of the way of the categories above. Seaplanes and WIG craft are special cases.
Why it shows up on the exam
Memorise the order: 'New Reels Catch Fish So Powerfully'. Rule 18 is the most-asked rule in the entire module.
Authoritative source
International parallel
COLREGs Rule 18 — Responsibilities Between Vessels →More from Part B-II — In Sight of One Another
Related drills
Drill Inland Rule 18
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