La Nave Bianca is a movie about a group of firemen on a Italian battleship, that takes part in a sea battle. During the battle one of the heaters is wounded and brought to the hospital ship, where he meets a nurse…
The film is intercut with documentary scenes from the movie La battaglia dello Jonio and the cast is completely non-professional. There has been an argument ever since about who directed the movie (Rossellini or de Robertis). A dissertation from 2002 (here on the tracker torrent) seems to decide this question finally in favour of Francesco de Robertis, who is most likely the writer of the script, main director and supervisor, whereas Rossellini merely took part in the production as learning assistant director.