Two air start receivers are fitted. The total capacity of the receivers must be sufficient to start the engine 12 times alternating between ahead and astern without recharging the receivers. In the case of a unidirectional engine, then the capacity must be sufficient for 6 starts.

The air receiver will be fitted with a relief valve to limit the pressure rise to 10% of design pressure. A pressure gauge and a drain must also be fitted. A manhole gives access to the receiver for inspection purposes.