USCG Exam Practice · Radar fundamentals and ARPA basics
Per 33 CFR §164.40, what is the maximum permissible speed error for a speed and distance device required to be fitted on a vessel equipped with ARPA, when the vessel is operating free from shallow water effect and from the effects of wind, current, and tide?
- A2 percent of the speed of the vessel, or 0.2 knot, whichever is greater
- B5 percent of the speed of the vessel, or 0.5 knot, whichever is greater✓ correct
- C10 percent of the speed of the vessel, or 1.0 knot, whichever is greater
- D5 percent of the speed of the vessel, or 1.0 knot, whichever is greater
Why B is correct
33 CFR §164.40(b)(2) specifies that errors in indicated speed should not exceed 5 percent of the speed of the vessel, or 0.5 knot, whichever is greater, when operating free from shallow water effect and from the effects of wind, current, and tide.
Cited:33 CFR §164.40
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