Think the movie was made before 1970. War movie about a military sub takes over a enemy skip and poses as the enemy so the can resupply enemy ships. The supplies they put on board explode and the enemy is killed.

Mystery Submarine (http://en.wikipedia.org/wiki/Mystery_Submarine_%281963_film%29)?

Thanks for your help but this wasn't the right movie. Adding more information, I remember the good guys took over the bad guys supply ship. When the bad guys subs came around to restock supplies, the good guys on the bad guys ship stocked the subs with torpedo's that would explode after a set time thus blowing up the subs and all the enemy. Was a cool movie and saw about 35 years ago. Please help me get this movie out of my head by finding the name. Thank you.