What is not a system
Direct Answer
Option A: Main Engine
The main engine is a complete functional unit that propels the ship. The boiler, purifier, and air compressor are individual systems or machines that are often part of the ship's overall engineering setup, but the main engine itself is the primary propulsion machine.
All Options
Detailed Explanation & Context
The main engine is a complete functional unit that propels the ship. The boiler, purifier, and air compressor are individual systems or machines that are often part of the ship's overall engineering setup, but the main engine itself is the primary propulsion machine.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).
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