Aircraft: A-4F Custodian: VA-23 BuNo: Modex: NM- Location: USS Oriskany Date: 14APR69 to 17NOVV69 Photo credit: Lee Morris Contact: Lee Morris Description: "Black Knight" Plane Captain expresses himself. The circle aft of the name box is the pressure relief valve to equalize pressures and allow the pilot to get the canopy open and exit more easily under water during a ditching.