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For a timeline outline I am working on:
I'm looking for alternative submersible smallcraft, to be carried to sea by, launched from (and recovered by), a 'mother ship' submarine. Missions types would include:

Alexandrian/Scappa Flow raiders. Small submersible craft attacking major fleet units at anchor - because smaller is better when trying to penatrate the anti-submarine defenses, and plan to have several infiltration mini subs involved in the effort-all of which are expendable. Mother ships supporting them until harbour is filled, then go in...
{This type needs no high speed, nor extended range, nor extensive weapons load} Size medium.

Anti Anti-Submarine ship. Very fast submerged speed w/powered mines that get to target depth for pattern detonation.
{This type needs (underwater) speed as its prime requirement, along with enough weapons load to make repeated runs} Size small.

Submersible torpedo rack. A submersible that is essentially just a bunch of torpedo tubes that can all be launched at once, for saturation attacks upon a convoy.
{This type needs a large weapons load w/total launch capability. Just enough speed to get into position, but a long enough range/duration to permit usefull station keeping} Size large.

As always, the PoD is that of a 1919 Germany, with a group of rich military/industrialists leading the charge to develop new weapons of war to enable Germany to fight and win a revenge war against the UK & France. This thread is for the undersea portion.

If you have any ideas for designs, doctrines, secret weapons development strategies etc...

Looking forward to your input folks.
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