31. The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current?

The flood begins at the bay entrance at 1526. Traveling at 8 knots from Philadelphia, you lose the ebb current at Mile 63, where your arrival time coincides with the end of the ebb and the beginning of the flood, as determined by the tidal current time-difference diagram.