The mission requires you take her down to about 430-440 feet or so. To trigger the mission as completed, you have to be at that depth for about 45seconds to a minute or so.
The balao is the only boat where i set the D key functionality to level the boat off, just before its acutal crush depth. The reason is, the depth gauge only goes to 450 feet. By setting the D key to the saftey depth, i would have impaired the balao, and denied it its one true asset, deeper depth as a "thick skinned" boat, so i had to set the D key function, deeper.
|