Final answer:
When filed overwater, there is no minimum FL for the cruise altitude.
Step-by-step explanation:
No, there is no minimum flight level (FL) for the cruise altitude if a flight is filed as overwater with life vests or overwater equipment.
FL, or flight level, refers to a standardized vertical altitude used in aviation. Altitude is measured in feet above mean sea level (AMSL).
When flying overwater, there may be specific regulations and equipment requirements depending on the jurisdiction and the type of aircraft involved. For example, some regulations may require properly equipped life rafts, radio communication systems, or extra fuel reserves. However, the specific cruising altitude (FL) may not have a minimum requirement.