| Pressure | TBD |
| Suit mass (1g) | TBD |
| Life support (primary) | Not publicly documented |
| Life support (backup) | — |
| EVA duration | N/A |
| Program | Pre-Mercury R&D |
| Agency | US Navy |
| Manufacturer | B.F. Goodrich |
| First use | TBD |
| Status | Experimental — never flown |
| Donning / entry | Not publicly documented |
Distinctive arrowhead helmet visor geometry
Naval high-altitude pressure suit research
Not publicly documented
"Naval and NASA pressure suit research tracks cross-pollinated significantly in this era"
Helmet geometry influenced later Mk IV operational variant
"Established B.F. Goodrich as the lead US full-pressure suit contractor before Mercury existed"
"Parallel development track alongside Model O testing different mobility solutions"
"The most direct production line from naval aviation pressure suits to spaceflight hardware"
