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Q9. (a) Explain the principles behind de-rating a ship propulsion engine and the benefits. Can a derated engine be run at full power? If yes, under what conditions?

(b) Briefly explain approved procedures for de-rating of an existing propulsion engine.

Q3. What is slow steaming & how it’s achieved without engine modification? Enumerate various operational issues with slow steaming. How such operational issues can be dealt with?

Q4. a) Describe the actions and checks required to ensure that a crosshead main propulsion engine may be operated in a slow steaming condition. (8)

b) Explain the problems which may arise during a prolonged period of slow steaming (4)

c) Explain what actions should be taken before and after the engine is returned to normal operation after a period of slow steaming (4)