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USCG Exam Practice · Rule 3 — General Definitions

Under the Inland Navigation Rules, which of the following correctly distinguishes a 'vessel not under command' from a 'vessel restricted in her ability to maneuver'?

  1. AA vessel not under command is unable to maneuver due to some exceptional circumstance; a vessel restricted in her ability to maneuver is unable to maneuver due to the nature of her work✓ correct
  2. BA vessel not under command has no crew on watch; a vessel restricted in her ability to maneuver has a reduced crew
  3. CA vessel not under command is aground; a vessel restricted in her ability to maneuver is at anchor
  4. DA vessel not under command is unable to maneuver due to the nature of her work; a vessel restricted in her ability to maneuver is unable to maneuver due to some exceptional circumstance

Why A is correct

33 CFR §83.03(f) defines 'not under command' as inability to maneuver due to some exceptional circumstance, while §83.03(g) defines 'restricted in her ability to maneuver' as inability arising from the nature of her work. The distinction is the cause of the limitation, not crew status or the vessel's position.

Cited:33 CFR §83.03(f)33 CFR §83.03(g)

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