^trips-dub-dubs^
Looking at an aerial photo of the River Arun it appears that the ship is carrying building ballast materials and most likely is making a 180 turn in the river before unloading at the wharf so that it does not have to reverse out of the river.
FF code is well known to plane enthusiasts (Fighting 1st)
http://www.aerospaceweb.org/question/history/q0222.shtml
https://www.globalsecurity.org/military/agency/usaf/tailmark.htm
http://www.aerofiles.com/buzz-tails.html
https://en.wikipedia.org/wiki/List_of_active_United_States_Air_Force_aircraft_squadrons#Fighter_Squadrons
1st FW motto - "Conquer or Die".