Class 4 (4th Engineer) MEKG 📅 Sep 2024

Exam Question

5 (a) Whilst on 'seawatch' you observe that the Oil Mist detector(OMD) in the engine room has triggered an alarm; and in feeling the crankcase doors on the bottom platform, you find that the unit in question feels warmer than the rest. What pre-emptive action will you take as Watch-keeper to bring the situation under control.

(b) Draw a simple line diagram of a 'OMD' and explain it's working.

Reference Answer

### (a) Pre-emptive Actions for Oil Mist Detector (OMD) Alarm
Upon observing the OMD alarm and identifying a warmer-than-normal crankcase door, the following systematic and safety-critical actions must be taken by the Watch-keeping Engineer. The primary objective is to prevent a crankcase explosion while securing the engine and vessel safely.
#### **Phase 1: Immediate Emergency Response**
1. **Inform the Bridge:** Immediately notify the Bridge Duty Officer via telephone. State clearly and concisely: "Oil Mist Detector alarm for Main Engine, high risk of crankcase explosion. Request permission to reduce speed and stop the Main Engine." This ensures they are aware of the navigational implications.

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