Welcome aboard, mlsmith45. Happy Hunting. I'm assuming you are using TMO 2.5, though I think it holds true in all versions of TMO, if you go to the icon that says misc., and click on the radio button, and drag the image down, it shows a map of the Pacific and shows Nippon minefields, air coverage, and shipping lanes, along with the years for these. I think there is a legend somewhere on the map too. I looked up actual data for Japanese shipping during WWII and the map information from TMO is accurate. If you patrol those areas you're bound to run into something. Remeber, patience is a virtue, sir. Again, welcome aboard and happy hunting, skipper.