At 1022 when you complete the evacuation, you get underway on course 098°T and order turns for 14.5 knots. You take the following round of bearings at that time:
Stratford Point Light 260° per gyrocompass New Haven Light 326° per gyrocompass SW Ledge Light 358°
• Using three simultaneous compass bearings to obtain a fix on the chart • Converting ordered speed in knots to nautical miles per minute using ( \text{Speed} = \frac{\text{Distance}}{\text{Time}} ) • Projecting a course line from a known fix to estimate time and distance to a future point
• From 1022, first plot the three gyro bearings to Stratford Point, New Haven, and SW Ledge to get your position; what does that give you on the chart? • After finding that position, draw your course 098°T and mark off your progress along that course for each candidate time using your ordered speed. How far along the track are you at each time option? • Compare the chart distance from your 1022 fix to the reference point or line the question is asking about; which time option gives a run distance that matches that chart distance most closely?
• Confirm you have converted all gyro bearings to true correctly before plotting (using the given gyro error from the larger problem). • Convert 14.5 knots to nautical miles per minute before doing any time checks, and be consistent with your units. • Measure the distance on the chart from the 1022 fix along course 098°T to the required point, and compare that to distance = speed × time for each answer choice.
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