Table 2.pdf

Table II – Desired UBA Characteristics

Characteristic Description Operational

Temperature Range:

UBA should be capable of operating, in salt water, within the temperate range of 32⁰ F to 95⁰ F.

Human Interface -

FFM:

UBA should be compatible with a Full-Face Mask already listed in the Approved for Navy Use (ANU) list or one that, under best judgement of the vendor, would meet the requirements to be listed under the ANU. The FFM shall include either an Oral nasal mask or a bite bit.

Diver Head Protection: UBA should be compatible with head worn equipment for diver head protection and to promote thermal protection.

Weight:UBA while in its fully operational configuration (scrubber canister filled, gas cylinder filled, and all pre-dive checked completed), should weigh no more than 70 pounds (lbs) with an objective weight of 45 lbs.

Physical Size:(Note: thickness is the most important dimension and is defined as the distance from the user’s back to the outermost point of the UBA) Option 1:

Thickness – 9 inches; Width – 22 inches; Height – 18 inches Option 2:

Thickness – 12 inches; Width – 16 inches; Height – 20 inches

CO2 Scrubber Type:UBA should be compatible with prepacked or solid cartridge style scrubber designs (i.e. Micropore Inc.©, Divesorb Go®, etc.)

Off Board Gas Supply:

UBA should have the capability to utilize off board Emergency Gas Supply

(EGS).

Breathing Resistive Effort:

UBA should not exceed 2.4 kPa at 62.5 RMV at 300 fsw while maintaining a constant partial pressure of oxygen (ppO2) setpoint of 1.3 ppO2 with helium as the diluent gas. Values shall be averaged over a minute.

Life Support Duration: UBA should provide continued life support, up to 0.5% Surface Equivalent Value (SEV), for a minimum of 180 minutes at a constant depth of 300 fsw while exposed to a surrounding water temperature of 32⁰ F and a carbon dioxide (CO2) injection rate of 1.35 standard liters per minute (slpm) at 40

RMV.

Gas Capacity:All required UBA gas cylinders should have a minimum working pressure rating of 3,000 psig.

Gas Cylinder Certification:

All required UBA gas cylinders should meet U.S. Department of Transportation (DOT) requirements.

Dead Space:The UBA should have an average inspired CO2 less than 2% surface equivalent value at 22.5, 40 and 62.5 RMV (as defined per U.S. Navy Dive Manual, Rev. 7). Values shall be averaged over a minute.

Biometric:UBA should be capable of tracking, displaying, and monitoring Life support data and metrics (i.e. oxygen partial pressure, inhalation gas temperatures, decompression schedule, etc.)

Characteristic Description Off-Gas

Contaminants:

UBA should meet the requirements of SS800-AG-MAN-010/P9290, Revision A, Appendix F, off-gas requirements.

Hyperbaric Compatibility:

UBA should be capable of being set up and used within a hyperbaric environment (i.e. under pressure, high humidity, etc), including all required setup procedures (i.e. Calibration, predives, etc) prior to achieving an operational condition of the system.

Technical Readiness Level:

UBA should meet the requirements, per DoD guidance, of Technical Readiness Level (TRL) 6.

DoD Technology Readiness Assessment Guidebook:

https://www.cto.mil/wp-content/uploads/2023/07/TRA-Guide- Jun2023.pdf