Obviously C-2A 162172 of VRC-40 „Rawhides“ made an emergency landing (ADSB showing squawk 7700) on 20.5. at 17.13h. It took off at Prestwick and presumably was on a s/w course presumably to Hamburg.
It attempted to land on the carrier, but failed and had to divert to a shorebase due to low on fuel. Alternates discussed were Wittmund, Hamburg, Nordholz, Hohn, but in the end Sylt was closest.