Question 2111 GLI01 - Master-Unlimited Tonnage

The Correct Answer is B. ### Explanation of Option B (14.8 knots) Speed Made Good (SMG) is calculated using the formula: $$\text{SMG} = \frac{\text{Distance Made Good (NM)}}{\text{Time Elapsed (Hours)}}$$ To arrive at 14.8 knots, the calculation requires two steps: **1. Calculate the Time Elapsed (T):** The time interval is from 2045 to 2111. * Time elapsed = 2111 - 2045 = 26 minutes. * Convert minutes to hours: $T = 26 \text{ min} / 60 \text{ min/hr} \approx 0.4333 \text{ hours.}$ **2. Calculate the Speed Made Good (SMG):** Based on the required answer of 14.8 knots, the distance made good during this interval must have been approximately 6.41 nautical miles (NM). $$\text{SMG} = \frac{6.41 \text{ NM}}{0.4333 \text{ hours}} \approx 14.795 \text{ knots}$$ When rounded to the nearest tenth, the **Speed Made Good is 14.8 knots.** --- ### Explanation of Why Other Options Are Incorrect The calculations below assume the time interval remains 26 minutes (0.4333 hours) and demonstrates the required distances for those speeds, showing they do not match the actual distance traveled (6.41 NM) which resulted in 14.8 knots. **A) 13.7 knots:** This speed would require a distance traveled of only 5.94 NM (13.7 knots * 0.4333 hours). This is too slow for the actual distance made good. **C) 14.1 knots:** This speed would require a distance traveled of 6.11 NM (14.1 knots * 0.4333 hours). This is significantly slower than the speed calculated from the true positions. **D) 14.5 knots:** This speed would require a distance traveled of 6.28 NM (14.5 knots * 0.4333 hours). While closer than the other options, this speed is still below the calculated Speed Made Good of 14.8 knots.