Full title reads: "Barge Balloon Barrage."
Small anti-mine motorboat in heavy sea.
Various shots of Air Vice Marshal Boyle inspecting men on board the motor boat "Stion".
Various shots of balloons flying from the motorboats and barges anchored just offshore, with cut-in of Air Vice Marshal Boyle.
N.B. Boyle is from the R.A.F. (RAF Royal Air Force) Balloon Command.