In the acronym, what does 'Catch' represent?

• A. Power Driven/Sailboats under engine power
• B. CBD/Constrained by draft (international waters only)
• C. Sail/not under engine power
• D. Not under command

Answer: (B)

The concept being tested is identifying what the category represented by the term Catch refers to. Catch stands for Constrained by Draft, abbreviated CBD. This describes a vessel whose ability to maneuver is limited by its draught—the depth of water it requires to float—which means it cannot easily deviate from its course or speed. In practice, vessels constrained by their draft have to plan their movements with the understanding that they can’t maneuver as freely as others, and this affects how they navigate in relation to other vessels.

The other descriptions refer to different vessel states or types that don’t match the CBD idea. A vessel described as power driven or sailing under engine power is about propulsion, not maneuverability limitations due to depth. Not under command is a distinct, specific navigation rule status. So the term Catch aligns with Constrained by Draft, the CBD concept.