Final answer:
The exact length of unstowed suspension lines on the ACES II recovery parachute would typically be found in the aircraft's technical manuals. This information is not publicly disclosed and must be obtained from the official documents for accuracy and safety.
Step-by-step explanation:
The question relates to the Advanced Concept Ejection Seat II (ACES II), which is a ejection seat system used in military aircraft. The specifics of the recovery parachute, which is a critical component of the seat's escape system, are crucial for the safety of the pilot. While the correct figure for how many inches of suspension lines should be left unstowed on the ACES II recovery parachute could be part of the technical manuals specific to the aircraft and seat system, this information is generally not disclosed publicly for safety and security reasons. To find the precise number of inches, one would typically refer to the official technical orders or maintenance manuals provided by the manufacturer or the governing military body. These documents are carefully controlled and are not available to the general public or students for reference. For an accurate and safe answer, personnel must refer directly to the specific manuals associated with the ACES II.