Chart Navigation & Plotting · Speed-Time-Distance — Three-Minute Rule
Using the three-minute rule, a vessel making 14 knots travels how many yards in 3 minutes?
- A4,200 yards
- B140 yards
- C700 yards
- D1,400 yards✓ Correct
Explanation
The three-minute rule: distance in yards in 3 minutes ≈ speed in knots × 100. At 14 knots that is about 1,400 yards. (One knot ≈ 33.8 yards/min, so 3 minutes ≈ 101 yards per knot, rounded to 100.)
Authority: Bowditch (Pub. No. 9), Speed-Time-Distance
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