We go by parts (said Jack the Ripper...)...
1. The list of MOD characteristics is detailed in each information attached to the respective version. Not only new ships but also bug fixes or inaccuracies in sensor and weapon ranges, e.g. The changes in the engine, correspond to a modding level 3. Those who make them are unwilling to reveal their "magic potions" to the uninitiated

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2. As for the Career mode, I am personally prone to modify and play individual
missions, choosing my type of submarine (usually personal modifications
that give me approximations to ships that have served in the Navy of my
country) and choosing my opponents and the level of ferocity of their anti-
submarine tactics. I didn’t really get into following Campaigns.
3. Modifications to the HUD arrangement are available to users of the dot mod
and the instructions are in several easy to follow posts. I hope I brought
you something useful. Greetings!. Marcelo
