Your 1152 position is LAT 37°23.9'N, LONG 76°05.5'W. You are turning for 10.3 knots. What is your ETA at Trestle C of the Chesapeake Bay Bridge and Tunnel if you follow York Spit Channel?
• Speed-Time-Distance formula: ( \text{Time} = \frac{\text{Distance}}{\text{Speed}} ) and converting decimal hours to minutes • Using the chart to measure distance along York Spit Channel from the given position to Trestle C • Converting between knots, hours, and minutes carefully
• How will you trace the exact route you must follow along York Spit Channel from your 1152 position to Trestle C, rather than drawing a straight line? • Once you measure the total distance along the channel, how do you convert that distance at 10.3 knots into hours and then into minutes past 1152? • After you get a decimal time value, what is the correct way to convert the decimal fraction of an hour into minutes without rounding errors that might change the choice?
• Verify you measured the distance along the channel track, not a simple straight-line distance • Double-check the speed setting on your speed-time-distance calculator (or work) is 10.3 knots, not 10 or another rounded value • Recheck your time conversion from decimal hours to minutes so your final ETA lines up exactly with one of the choices
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