As long as you don't expect anything substantial, "Operation Petticoat" works quite well as light entertainment, thanks to a lively script with some pretty good material, two good leading performances by Tony Curtis and Cary Grant, and a solid supporting cast. While the whole story has very limited plausibility, it has its own internal logic and consistency, rather like the better of the more manic screwball comedies of an even earlier era.
The submarine setting is used creatively, and it has just enough realistic detail to keep it from getting too silly. Grant and Curtis have rather different styles, yet they work well together in setting the right tone for everything, and in involving the rest of the cast. While it would be hard to single out any of the other cast members, since none of them have a particularly large or important role, they all do well enough, and they make the secondary characters a solid part of the story.
There are plenty of amusing highlights, such as the pink paint and Curtis's scrounging expeditions. For all that it is just fluff, it fits together well, making for an entertaining, unpretentious movie.
