USCG Exam PracticeRule 7 — Risk of Collision
Under the Inland Navigation Rules, when making radar observations to assess risk of collision, which practice is specifically prohibited?
- A. Using long-range scanning before switching to short-range.
- ✓ Making assumptions on the basis of scanty radar information.Correct
- C. Plotting radar contacts at intervals greater than six minutes.
- D. Using radar in conjunction with visual bearings.
Why B is correct
33 CFR §83.07(c) explicitly states that assumptions shall not be made on the basis of scanty information, especially scanty radar information. Insufficient data must not be used to conclude that risk of collision does not exist.
Cited:33 CFR §83.07