When approaching a lock and at a distance of...

Question 1 / 2707066636ee928f7522a1c519168

Question 1 of 2707066636ee928f7522a1c519168

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?

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Question 1 of 27070

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?

🔍 Key Concepts

• Inland Navigation Rules – sound signals for locks and bridges (not the standard meeting/crossing/overtaking signals) • Difference between long blast and short blast durations • How mariners request single vs. double lockage by sound signal

💭 Think About

• Think about which signals you normally use for meeting, crossing, or overtaking situations, and consider whether this lockage signal is one of those or a special-purpose signal. • Ask yourself: does a ‘single lockage’ mean you want one chamber cycle for just your vessel (or group), and would that likely be a simple, easily distinguished pattern? • Consider how a lock operator needs to distinguish between a request for lockage and other routine maneuvering signals in the area.

✅ Before You Answer

• Verify in the Inland sound signal regulations that there is a specific pattern for requesting lockage, separate from maneuvering signals. • Confirm the duration difference: a long blast is typically 4–6 seconds, a short blast about 1 second. • Check which of the options is not commonly used as a meeting/crossing/overtaking signal, making it more suitable as a special lock-request signal.

Question 1 of 27070

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?

Two long blasts

One long blast followed by one short blast

Two short blasts

One short blast followed by one long blast

Question 1 / 2707066636ee928f7522a1c519168

Question 1 of 2707066636ee928f7522a1c519168

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?

Back

Question 1 of 27070

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?