Stealth Land?

[Quillan]

April 1944. I'm out on patrol in the USS Billfish, when I get a radio message from Subpac that all Midway-based boats are shifting to Majuro in the Marshall Islands for their new home port. On the way back, I have a little bit of trouble.



No matter how close I zoom in on the nav map, all the land is shown on the southern part of the atoll. The first time I tried going in, I'd originally plotted to go north around the shallow water then head south for the tender, but I decided to shift across the shallow water to avoid possible collision with a patrolling destroyer. I ran aground and destroyed the boat. So I reloaded the save game, and redid my return trip from near Formosa. This time, as you can see, I plotted a course across the saddle between the atoll on the south and the shallow water to the north. This isn't shown as the color of the shallowest possible water. This is acutally the color of the fourth shallowest water, which I'd expect to be at least 100-200 feet deep. So how did I run aground taking this course in?

Needless to say, I was on the bridge running this in manually when it happened, and after it did I just reloaded again and just came around from the north. Is there invisible land in the game? I didn't see anything from the bridge, but it's possible it's just too shallow for the boat and the nav map is incorrect there.