🔍 Key Concepts

• Small passenger vessels <100 GRT marking requirements in 46 CFR Subchapter T • Differences between watertight and weathertight closures • Why clear marking of watertight doors and hatches is important for damage control and passenger safety

💭 Think About

• Think about what the crew must be able to recognize quickly during flooding or an emergency regarding watertight integrity. • Consider whether a marking that is only visible from one side could ever create confusion in an emergency. • Ask yourself if the Coast Guard tends to be more strict or more relaxed about identification of critical safety closures on passenger vessels.

✅ Before You Answer

• Verify in 46 CFR (Subchapter T) how watertight doors and hatches are to be identified/marked on small passenger vessels. • Check if the regulation mentions letter height (about 1 inch / 25 mm) as a specific requirement. • Confirm whether the wording requires marking on one side, both sides, or says nothing about sides.