In August 2013, the Air Force said they were close to finalizing a plan to sustain and modernize their UH-1Ns for the next six to 10 years. The plan was to sustain the fleet, address flight and safety mandates, investigate modest improvements in capabilities, and reduce capability gaps. While the Huey is one of the oldest platforms in the service, keeping the fleet going was seen as having "minimal risk". Fleet-wide upgrades included night vision-compatible cockpit lighting, crash-worthy seats for flight engineers, and installation of a helicopter terrain-awareness warning system and traffic collision-avoidance device. The Air Force was also in the process of further acquiring ex-Marine Corps UH-1N models. The Marines were working out a strategy to transfer as many as 26 helicopters to the Air Force to either add them to their active fleet or keep them in reserve.