Exam Question

### (a) Basis for Deciding the Capacity of Main Air Reservoir and Associated Rules
**1. Basis for Capacity Decision:**
The primary basis for determining the capacity of the main air reservoirs on a motor ship is to ensure sufficient stored pneumatic energy for the reliable starting and maneuvering of the main propulsion engine, especially during critical situations such as leaving or entering a port, or recovering from a black-out condition. The capacity must be adequate to perform a specified number of engine starts and reversals without the need to run the main air compressors.
This requirement is fundamental for the safety and operational readiness of the vessel. It guarantees that the vessel can maneuver as required by the bridge, even if the air compressors are temporarily unavailable.