Really simple build that I just needed for another project, figured I'd upload it.
Doesn't actually do anything other than add visual realism.
Really hard to find good pictures of the actual device, if you look in the far right side of the thumbnail you can see a splash of orange, which is this device.
The ACMR pod system (Air Combat Maneuvering Range) has its origins in the establishment of the Top Gun school at NAS Miramar. Founding officer USN Capt. Dan Pedersen quickly realized the need for a way to play back training engagements, and this was backed up by USN Captain Ault's 1969 report, which said the same thing. Before long, Cubic Corporation, based in San Diego constructed the first examples of the pod, which were test flown by Dave Frost on an F-4 Phantom in 1972. The system was refined, and successful development near MCAS Yuma led to a complete integration, allowing instructors to play back a real time, switchable perspective, and extremely accurate recording of any training engagement.
This system has since been adopted by the USAF and others, as it is an invaluable training tool.
Source: Top Gun by USN Capt. Dan Pedersen