The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?

Correct Answer: Option D — 9 jumbo barges

A jumbo barge typically measures 195 by 35 feet. Nine jumbo barges arranged in a 3x3 configuration create a footprint of 585 by 105 feet. When combined with a 150-foot towboat, the total length exceeds the 600-foot lock chamber, necessitating a double lockage to transit safely.