Does any designer know about submarines?

Not sure why designer / modeler needs to know much about submarines. Skilled modeler just needs blueprints and probably some photos of the details. During the process of modeling, a client can warn designer about some detail and it will be fixed.
I have one sub among my models (USS Perch). It's not detailed but it has a shape based on blueprints. Some day I might add some more details if I'll have more time and interest to do it.
Be careful with scaling for 3D printing (point 3.). Submarines have some thin parts (like fence) and the model should be adjusted if you want to scale it and print it in some small size.

Search for Submarine models on here......find a model which you think is good and approach them via the hire button? Simples!

"Does any designer know about submarines?"
Yes, it´s already proven that main stream media uses extended submarine stories for government PSYOPs.
See: Missing Titanic tourist submarine...

Have a clue as to actual submarines—someone who served on one designed many or have seen one at a museum. The possibilities for this are very profitable for the designer who can quickly get me what I need—needing all flavors of the GUPPY series of diesel boats, including the various sails. USS BONEFISH, USS TROUT, USS SEAWOLF SSN 575 early and late versions, SSBN 616 and 640 class. Please if you don't know submarines, don't waste both of our time.

Thanks and regards..
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Awesome!