USCG Exam PracticePassing distance and CPA from chart plot
A vessel is required to be fitted with an ARPA under 33 CFR §164.38. What is the maximum permissible speed error for the required speed and distance indicating device when operating free from shallow water effect and free from wind, current, and tide?
- A. 2 percent of vessel speed, or 0.2 knot, whichever is greater
- ✓ 5 percent of vessel speed, or 0.5 knot, whichever is greaterCorrect
- C. 5 percent of vessel speed, or 1.0 knot, whichever is greater
- D. 10 percent of vessel speed, or 0.5 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, under the stated free-water conditions.
Cited:33 CFR §164.40