If a towboat requires a double lockage it...

Question 1 / 2707066636ee928f7522a1c51a32a

Question 1 of 2707066636ee928f7522a1c51a32a

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?

Back

Question 1 of 27070

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?

🔍 Key Concepts

• Inland Navigation Rules – Sound Signals near locks and dams • Special sound signal patterns used to request lockage versus communicate maneuvering intentions • U.S. Army Corps of Engineers / 33 CFR requirements for towboats approaching locks

💭 Think About

• Ask yourself: which of these signals is associated with a vessel requesting a double lockage rather than just normal meeting/overtaking maneuvers? • Think about the typical pattern: when you see one long blast combined with short blasts, what does that usually indicate in maneuvering rules—and is this question about maneuvering or about lockage requests? • Consider how mariners and lock operators avoid confusion: would they use a signal that is easily confused with standard crossing or overtaking signals, or a distinct pattern reserved for lock operations?

✅ Before You Answer

• Verify in 33 CFR or lock regulations which specific sound signal pattern is defined for a double lockage request. • Make sure you distinguish between signals used for overtaking / meeting (Navigation Rules) and those used for locks and dams (CFR/Corps bulletins). • Check that the signal pattern (order and number of long vs. short blasts) is unique enough that it won’t be confused with common passing signals.

Question 1 of 27070

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?

Two long blasts followed by one short blast

One long blast followed by one short blast

One short blast followed by two long blasts

One long blast followed by two short blasts

Question 1 / 2707066636ee928f7522a1c51a32a

Question 1 of 2707066636ee928f7522a1c51a32a

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?

Back

Question 1 of 27070

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?