🔍 Key Concepts

• Meaning of the term dog in shipboard hardware and fittings • Where you commonly find dogs on watertight or weathertight closures aboard ships • Difference between tools (like crow bars and wedges) and fastening/locking mechanisms on doors and hatches

💭 Think About

• On a ship, when someone says "dog the door" or "dog down the hatch," what action are they asking you to perform? • Which of the options describes something that stays attached to the door or hatch and is used to secure it closed, rather than a separate tool you carry around? • Think about which choice would most logically be part of a watertight or weathertight closing system on a bulkhead or hatch cover.

✅ Before You Answer

• Verify which option is a permanent securing/locking fitting typically mounted on doors, hatches, or scuttles • Eliminate any choices that are hand tools normally carried by a person rather than being attached to a closure • Confirm which device is specifically used to pull a door or hatch tight against its frame or gasket to maintain a seal