Warships make more frequent and rapid speed changes than merchant ships maintaining a steady cruising speed. Those changes add wear, while salt water creates further maintenance demands. A nominal twelve-month service interval does not mean a navy should wait until the twelfth month. Servicing the equipment every four months is the example used here to keep a large margin available if combat begins unexpectedly.
Notable Point ยท 55:29-56:40
Why warships are maintained before their service limits
Rapid speed changes, salt water and uncertain combat demands justify servicing warship equipment well before its nominal maintenance limit.