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Complete Rule Coverage

All 38 Navigation Rules explained with clear examples and visual aids

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500+ Practice Questions

10 full-length practice tests matching the official exam format

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Visual Learning

Diagrams, light configurations, and day shapes illustrated clearly

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What lights does a vessel restricted in ability to maneuver show?
Under Rule 27, a RAM vessel shows three all-round lights in a vertical line: red – white – red, plus sidelights and sternlight when making way. Memory aid: “Red-White-Red, RAM ahead!” 🚢
How does that differ from a NUC vessel?
Great follow-up! A NUC vessel (Rule 27) shows just two red all-round lights — no white in the middle. The key difference: NUC can’t maneuver due to exceptional circumstances, while RAM is restricted by the nature of its work.
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