This file remedies a small defect in a number of AMC Class 2 submarines that leads them to take on water and sink.
Once you have finished downloading this file, unzip it and copy it to your Creatures (or your COB) directory.
Next you need to launch the Object Injector from Creatures 1 and select the Submarine from the list.
Pressing Inject in the Object Injector will check whether your sunken submarine is salvageable and if so bring it to the surface and upgrade the window sealant.
If your submarine is too far down then a replacement will be provided. This COB will not increase the number of submarines in your world, although some submarines deemed beyond help sometimes return.