You are at anchor in the anchorage at the entrance to Delaware Bay. You weigh anchor at 1445 DST (ZD +4) on 24 July 1983 and proceed northbound enroute to Philadelphia at a speed of 10 knots. Which of the following should you expect to experience?
• Tidal current tables for Delaware Bay and River (look at the reference station and the subordinate stations) • How to convert Daylight Saving Time (DST) with ZD +4 to the time used in current tables • The effect of flood vs. ebb current on a northbound vessel from the bay entrance up to Philadelphia
• Start by converting 1445 DST (ZD +4) to the standard time actually used in the tidal current tables. What time and date do you use for looking up currents? • Identify the primary reference station for Delaware Bay currents, then trace how the timing and direction of current change as you move upriver toward Philadelphia. • For each leg of the trip (Ship John Shoal, Reedy Island, New Castle, Edgemoor, Philadelphia), ask: at the time you will pass that point, is the current predicted to be flooding or ebbing?
• Be sure you are using the correct time zone and DST adjustment before entering the tables. • Verify the sequence of passing times at each location based on your 10‑knot speed and distance between waypoints. • For each answer choice, compare its description with the pattern of flood/ebb you find at multiple stations along the route, not just one.
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