The searchlight on a survival craft must operate in cycles of what duration?

The requirement for a survival craft's searchlight to operate in cycles of 15 minutes on and 5 minutes off is based on ensuring the functionality and reliability of the equipment during potential emergencies. The specified duration allows for the searchlight to provide extended illumination when needed while also allowing a short period for cooling down. This prevents overheating of the searchlight, which can be critical in extended operations, particularly in survival situations where visibility is paramount.

Utilizing this cycle maximizes the use of the searchlight without risking damage due to continuous operation, thereby ensuring that it remains operational when it is most needed. Additionally, this operational pattern is designed to conserve power, which is essential in survival scenarios where resources may be limited. The choice of these specific durations balances the need for effective search capability with the longevity and reliability of the equipment.