USCG Exam Practice · Plot true course and distance between two charted points
A vessel's speed indicator is certified to the tolerances specified in 33 CFR §164.40. While operating free from shallow water, wind, current, and tide at 8 knots, what is the maximum allowable speed error?
- A0.4 knot
- B0.5 knot✓ correct
- C0.8 knot
- D1.0 knot
Why B is correct
33 CFR §164.40(b)(2) states errors must not exceed 5 percent of vessel speed or 0.5 knot, whichever is greater. Five percent of 8 knots is 0.4 knot, which is less than 0.5 knot, so the allowable error is 0.5 knot.
Cited:33 CFR §164.40
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