NAF-SUB-54 "Sneaker": Nogrania... does not rule the waves. But perhaps it could still rule the seas. To this end, we have developed not another ship, but a whole new (for Serouda) class of vessel: a submarine.
The Sneaker is a 250ft long vessel, with a submerged displacement of 1700 tons (1300 surfaced). It has a 'partial double hull', wherein the majority of the vessel has an outer hull and an inner hull (increasing sturdiness), but only a single hull at the ends, to make the torpedo launching apparatus simpler. We have not gotten overambitious with the test depth; a mere 240ft should be more than enough to avoid anything Toskesh can currently muster, or whip up quickly.
The Sneaker has 8 torpedo tubes capable of firing Blindman torpedoes- four bow, four stern- and carries 16 torpedoes. It also has a single Duke cannon on deck.
Two diesel engines charge two large batteries, which power two electrical motors that drive two shafts, giving the Sneaker a top surface speed of 18kn, and a top submerged speed of 9kn. It can stay submerged for at most 36 hours at 3kn. The range is not especially impressive, given that it is not meant to fight internationally, but only patrol the waters around Serouda.
It has a passive sonar system for detecting pursuers whilst submerged, as well as a periscope. Room for more advanced sensor systems exists, but have not been included in this early model.
The Sneaker will be useful as a scout/skirmisher/assassin in fleet battles, but also as a transport interdictor, sinking resource shipments and troop convoys.
NAF-SUB-54 "Sneaker": (1) NUKE9.13