United States Marine Corps Weapons & Equipment
Underwater Breathing Apparatus (UBA) System
Primary function: Closed-circuit diving equipment.
Manufacturer: National Draegar
Length: 24 inches
Width: 18 inches
Height: 10 inches
Weight: 27 pounds
Dive Time: up to 200 minutes
Introductory date: December 1992
Unit Replacement Cost: $8,600
Features: The Lung Automatic Rebreather (LAR V) is an Underwater Breathing Apparatus (UBA) that is the central
item of equipment necessary to perform closed-circuit diving for the Marine Corps. The UBA provides a combat diver
with enough oxygen to stay under the water for up to four hours. The exact time will depend on the individual diver's
rate of breathing and his depth in the water. The UBA decreases a diver's chance of detection by its ability to
prevent any exhaust bubbles from escaping to the surface. The UBA must be maintained in an oxygen safe room.
The LAR V will interface with the Oxygen Transfer Pump System (OTPS), K-bottle compressed air cylinder, Surface
Swimmer Set, Closed Circuit Life Vest, Diving Dry Suit Set, Tool Set, Shop Oxygen Equipment, and the LAR V Deployable
Tool Set.
Inventory: Active duty, 437; Reserve, 80
Information and Photos Courtesy of United States Marine Corps
