Always attempt to complete the mission. Radio in. If you spot a convoy radio this in. It triggers a response for your next move. As far as deploying to Honshu over and over, well, is this not were the war is? I did a Honshu. Once there, told to engage shipping. Sunk 10000 tons. Told to go to another area. Told to engage shipping once more. Sunk 10000 tons. I was told to go back to Honshu. Engaged shipping again. Ran out of torps and headed home without completing the last mission. I ended patrol. Started again and got a drop commandos. Calling convoys and sinking 10000+ tons or staying for 48 hours completes your missions. I was very surprised I did not get the Honshu again as I did not compete the last Honshu mission. The game is very strange sometimes.
