Question: I took on a convoy and survived. Took damage. Damage Control repaired all. Have Green accross the board. Stayed on surface until damage was repaired. Now when I submerge below 10m to periscope depth, my sub collaspes and implodes. I saved game after all repairs. Loaded saved game and I went to Midway to get refitted via the surface. Even after rfitting, same thing happens. Sub sinks every time I submerge. Help Please