Question 1530Navigation General

The correct answer is C) Double hull. A double hull tank barge is constructed with the structural framing outside the cargo tank and the cargo tank plating separated from the shell plating. This design provides an additional layer of protection against spills and is required by Coast Guard regulations for certain types of vessels carrying hazardous materials. The other options are incorrect because: A) Shell plated refers to a tank with the cargo tank plating as the shell plating, B) Hopper type refers to a specific tank configuration, and D) Independent tank refers to a cargo tank that is not part of the vessel's structure.