APQ-158[9]? https://en.m.wikipedia.org/wiki/AN/APQ-159
AN/APN-217 improved AN/APN-211 Doppler navigational radar system by Teledyne for AH-1W, UH-1N, SH-2G, SH-3D, HH-3F CH-46 CH-53E, MH-53E, RH-53D HH-60H/J SH-60B/F/J V-22. https://en.m.wikipedia.org/wiki/List_of_radars
And then I'd guess Casper, Jack-o'-lantern, and Grim Reaper are all pilot callsigns.
I don't know if the rubber mask is a character or just some generic Halloween type thing.
Very cool picture!
