You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which the current does not exceed 0.3 knot?

Correct Answer: Option C — 0935 to 1017

Calculating a safe transit window around slack water involves using the NOS duration of slack table to find the time span on either side of the exact slack when current velocity remains below the specified threshold.