Navigation General · Time-Speed-Distance
A vessel needs to cover 7.5 nm in 30 minutes. What speed is required?
- A7.5 knots
- B10.0 knots
- C15.0 knots✓ Correct
- D5.0 knots
Explanation
S = (60 × D) / T(min) = (60 × 7.5) / 30 = 450 / 30 = 15.0 knots.
Authority: Bowditch (Pub. 9), Ch. 7
Practice the full Navigation General bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Navigation General questions
- Time-Speed-Distance
Using the 60 D = S × T formula, how long will it take a vessel traveling at 15 knots to cover 45 nautical miles?
- Time-Speed-Distance
A vessel travels 90 nautical miles in 6 hours. What is the vessel's speed?
- Time-Speed-Distance
A vessel must travel 120 nautical miles and arrive exactly 10 hours from now. What speed is required?
- Time-Speed-Distance
A vessel at 8 knots travels for 45 minutes. How far has it traveled?
- Dead Reckoning
A vessel departs a known position at 0800 on course 090°T at 12 knots. What is the DR position at 1100?
- Dead Reckoning
Which of the following is the best definition of a Dead Reckoning (DR) position?