Blueprints at the Kaa Mangrove Outpost
Once you’ve made it to the Kaa Mangrove outpost, head to the Corrupt Compagnie Officer to Skull and Bones Items and purchase blueprints. The officer sells several useful blueprints, including:

Torpedo Crate Ammunition Blueprint

Description: This crate holds up to 60 torpedos.
Requirement: Must be Freebooter I.
La Forteresse I Ship Armor Blueprint

Description: Provides decent early-game ship armor.
Requirement: Must be Freebooter I.
Torpedo Grinder I Furniture Blueprint

Description: Increases torpedo speed by 15%.
Requirement: Must be Buccaneer I.
Barge Ship Blueprint

Description: A Rank 3 ship that specializes in damage and Skull and bones items for sale online the ablaze status effect.
Requirement: Must be Buccaneer I.
Kallinikos Flame II Weapon Blueprint

Description: An enhanced Sea Fire weapon.
Requirement: Must be Cutthroat I.