True or False: LPG lockers must be designed to open only directly to the outside atmosphere.

LPG (Liquefied Petroleum Gas) lockers must indeed be designed to open only to the outside atmosphere to ensure the safe venting of any potential gas leaks. This design requirement is crucial because LPG is heavier than air and can accumulate in enclosed spaces, creating a significant fire and explosion risk. By allowing the locker to open directly to the outside, any leaking gas can dissipate into the atmosphere rather than getting trapped inside an enclosed area, thus enhancing the safety of the vessel and its occupants.

It is essential for the proper handling and storage of LPG that any potential hazards are effectively managed, and this design helps to minimize the risk of hazardous conditions in the event of a leak. The safety standards set forth by ABYC and other marine safety organizations emphasize this requirement to protect both the vessel and its crew.

The options that refer to different conditions or partial requirements would not fully address the need for safety in the design of LPG lockers, which is why the choice stating that they must open only to the outside atmosphere is the accurate standard reflecting best practices in safety design.