USCG Exam Practice · Rule 7 — Risk of Collision
Under the Inland Navigation Rules, what standard governs the information a mariner may use when making assumptions about risk of collision?
- AAssumptions may be made freely provided radar is operational
- BAssumptions shall not be made on the basis of scanty information, especially scanty radar information✓ correct
- CAssumptions are permissible when visibility is good and a visual bearing confirms the radar data
- DAssumptions may be made once a vessel has been tracked for at least three minutes
Why B is correct
33 CFR §83.07(c) explicitly prohibits making assumptions on the basis of scanty information, with particular emphasis on scanty radar information. The rule does not provide a minimum tracking time or a visibility exception.
Cited:33 CFR §83.07
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