Once a MK 25 UBA is set up, how long is its storage life?

• A. Two weeks
• B. One week
• C. One month
• D. Three months

Answer: (A)

Storage life is the length of time a MK 25 Underwater Breathing Apparatus can remain fully configured and ready to dive before it must be serviced. After setup, the system’s gas integrity, scrubber materials, seals, and regulators can begin to degrade or drift even while stored, so a defined window is required to ensure safety and reliability.

Two weeks is the standard period specified because it strikes a practical balance: within two weeks the unit can be checked, any consumables or moisture-related issues addressed, and the gear validated before its next use. Storing longer than that risks uncertain performance, while shorter intervals would add unnecessary maintenance cycles.

The other options don’t fit the typical maintenance and safety schedule. A week is too short for routine checks, while a month or three months exceeds the recommended window and could allow deterioration that compromises safety.