The lockmaster has given you permission to...

Question 1 / 2707066636ee928f7522a1c519b14

Question 1 of 2707066636ee928f7522a1c519b14

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?

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Question 1 of 27070

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?

🔍 Key Concepts

• Lock operations and how water moves when a lock is filled vs. emptied • How current sets and swirls along a lower guide wall • Risk from other traffic (upbound/downbound) vs. risk from changing currents

💭 Think About

• Think about where the water comes from and where it goes when a lock is being filled compared to when it is being emptied. Which one affects the downstream (lower) side the most? • When you are tied off to the lower guide wall, what kind of current or surge could cause your lines to part or your vessel to surge violently? • Compare the danger from a passing upbound or downbound vessel to the danger from sudden changes in current and turbulence created by lock operations. Which is more likely to put heavy strain on your mooring lines at the lower wall?

✅ Before You Answer

• Identify which end of the lock is associated with lower guide wall = downstream side • Decide whether the strongest current and turbulence on the lower side happens when the chamber is being filled or emptied • Verify which choice directly relates to current reaction at the lower end, not just vessel traffic direction

Question 1 of 27070

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?

A downbound vessel

Current reaction when the lock chamber is being emptied

An upbound vessel

Current reaction when the lock chamber is being filled

Question 1 / 2707066636ee928f7522a1c519b14

Question 1 of 2707066636ee928f7522a1c519b14

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?

Back

Question 1 of 27070

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?