They're the scourge of unassuming merchants and quick saboteurs of outpost supply routes. But to generally experienced submarine crew, the vanilla ships pose little to no threat anymore. So, incase you feel like there is not enough pirate variety, here's this collection of pirate conversions ofevery vanilla submarine (Feb. '23).
Subscribing to Red's pirate pack will allow you to finally meet more than the same three ships on a mission to fight against while also giving the pirates the ability to survive for depths below 4000m.

This mod is however a SUBMOD of the ––>> actual pirate conversion mod <<–– to which you need to subscribe.

Subscribing to this collection, while appreciated, will only grant you the submarine files, it will NOT spawn them ingame.

Testing showed the subs need some upgrading to be more dangerous foes ingame. This will be done over the next couple days and implemented in Red's mod.
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Background-artwork: Barotrauma fanart[www.pinterest.com] by Aleksandre Lordkipanidze[www.artstation.com]