Backpack medical oxygen system (bmos) liquid oxygen (lox) filling station; provides a mobile capability for filling the backpack medical oxygen system (bmos), nsn 3655-01-598-9565; under standard conditions, the bmos should reach capacity within 5 minutes; 20 liquid liter lox capacity; constructed for two person carry; weight: approx. 125 lb when full; visual display of oxygen quantity and system unit pressure; fast fill port iaw mil-prf-25961(cru-50/a); loses approx. One liquid liter per day in standby