Lieutenant Droste wants to build an air station in the middle of the ocean to allow pilots on intercontinental flights to refuel and repair any damage to their aircraft.

Before chief engineer Damsky fled in a boat, he opened the ballast valves, causing a danger that F.P.1 will sink.

[2] Other parts of the set were filmed on platforms designed by Erik Kettlehut on the Baltic Sea island of Greifswalder Oie.

[citation needed] The French version (1933) was named "I.F.1 Ne Répond Plus" (English "I.F.1 no longer responds").

[citation needed] Reviewing the German-language version, Variety declared the film to be "UFA's greatest picture of this year" and found it to be "a success with regard to speed, continuity and cast of the leading femme role" and that photography and sound were "first class".

[7] Reviewing the French version, Variety called Charles Boyer "excellent" and said the film had an "Ordinary enough story but redeemed by wonderful photography and the thrills provided by trick machinery.

"[9] Film Daily highly praised the film, stating that the production "have outdone anything of its kind that Hollywood has ever conceived", specifically praising the built floating island, and calling the plot "a powerful romance intertwined into a very realistic story, with a great series of climaxes" with "Superior photography".

"[10] Following F.P.1, Hans Albers and director Karl Hartl teamed up for Gold and The Man Who Was Sherlock Holmes (1936).

[7] By 1933, a political joke referring to Adolf Hitler played on the title of the film: "P.G.1 antwortet nicht."