Class 4 (4th Engineer) SSEP 📅 Nov 2025

Exam Question

With reference to an emergency source of electrical power in cargo ships:

(a) Describe a typical power source. (10)

(b) Give a typical list of essential services, which must be supplied simultaneously. (5)

Reference Answer

### (a) Description of a Typical Emergency Power Source (10 Marks)
As per SOLAS regulations, a self-contained emergency source of electrical power is mandatory on cargo ships. Its primary function is to supply power to essential services in the event of a main power source failure (blackout). The system is designed for high reliability and survivability.
**1. Prime Mover:**
* **Type:** The most common prime mover is a high-speed, compression-ignition (diesel) engine, designed for reliability and quick starting.

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