🔍 Key Concepts

• Operation of air supply systems in totally enclosed lifeboats • Purpose of maintaining overpressure inside a covered lifeboat (smoke/fume exclusion) • Relationship between ventilation/air supply and closing openings like hatches and ports

💭 Think About

• Think about why a covered lifeboat has an air supply system at all—what outside condition is it designed to protect against? • If you want to keep harmful gases, smoke, or oil fumes out of the boat, what must be true about openings such as hatches and ports? • Which option, if done, would actually prevent the air system from doing its job or is unrelated to its safe operation?

✅ Before You Answer

• Identify which components must remain open for the air supply system and engine to function as designed • Check which item directly affects the boat’s sealing against outside atmosphere (smoke/gas ingress) • Eliminate any choices that would obviously disable the air system or the propulsion system without a safety reason in this context