You continue to steer 195°T. You pass Cape Charles Lighted Bell Buoy "14", 0.9 miles abeam to starboard at 2111. What is your speed made good from 2045 to 2111?
• Use the basic speed formula: Speed = Distance / Time with distance in nautical miles and time in hours • Figure out the elapsed time from 2045 to 2111 in minutes, then convert that to hours • On the chart, the 0.9 miles abeam to starboard tells you where you are on the track line relative to Cape Charles Lighted Bell Buoy "14"
• How many minutes pass between 2045 and 2111, and what is that as a decimal of an hour? • On your plotting sheet, how do you use the 0.9 miles abeam to find the point on your track that corresponds to 2111? • Once you’ve measured the distance run along the track from the 2045 fix to the abeam point, what speed do you get when you divide by the elapsed time in hours?
• Double-check the elapsed time between the two fixes before doing any speed calculation • Be sure the distance you measure on the chart is along your track line, not the 0.9-mile abeam offset itself • When you compute speed, confirm your calculator work and that your time is in hours, not minutes
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