You want to transit Pollock Rip Channel, MA,...

Question 1 of 2707066636ee928f7522a1c51a680

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?

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Question 1 of 27070

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?

🔍 Key Concepts

• Current tables for Pollock Rip Channel and how to read slack water entries • Understanding how current speed changes over time around slack (minimum current) • Using the rule-of-twelfths / interpolation to estimate when current is below a given knot value

💭 Think About

• Look at the table for 6 April 1983 and identify the times and maximum rates of the flood and ebb currents around the 0955 slack. How quickly does the current build on each side of slack? • Ask yourself: for how long before and after 0955 does the current stay at or below 0.3 knot as it changes from one direction to the other? • Compare the pattern of increase in current speed (per 10–15 minute step) to see during which answer choice’s time span the current would stay under 0.3 knot.

✅ Before You Answer

• Confirm the reference station and the correct Pollock Rip Channel subordinate station table for 6 April 1983 • Carefully note whether the 0.3 knot limit applies to both sides of slack (before and after 0955) • Check that the chosen time window does not include any period when the predicted current exceeds 0.3 knot in either direction