USCG Exam PracticeRule 6 — Safe Speed
At night, which of the following factors must be considered by ALL vessels when determining a safe speed under the Inland Navigation Rules?
- A. The effect on radar detection of the sea state, weather, and other sources of interference
- ✓ The presence of background light such as from shore lights or from back scatter of her own lightsCorrect
- C. The possibility that small vessels and ice may not be detected by radar at an adequate range
- D. The more exact assessment of visibility possible when radar is used to determine range
Why B is correct
33 CFR §83.06(a)(iv) specifically lists the presence of background light such as from shore lights or from back scatter of a vessel's own lights as a factor for all vessels at night. Options A, C, and D are radar-specific factors listed under 33 CFR §83.06(b), applicable only to vessels with operational radar.
Cited:33 CFR §83.06