Ballista Grinder I (Required:Corsair 1)

Ballista Works I (Required:Kingpin 1)

Bombard Grinder I (Required:Rover 1)

Bombard Powderhouse I (Required:Rover 1)

Bombard Works I (Required:Rover 1)

Brazing Furnace I (Required:Cutthroat 1)

Culverin Grinder I (Required:Rover 1)

Culverin Works I (Required:Marauder 1)

Demi-cannon Furnace I (Required:Rover 1)

Demi-cannon Works I (Required:Buccaneer 1)

Front Powder Kegs I (Required:Corsair 1)

Grindstone I (Required:Cutthroat 1)

Balanced Mast I (Required:Brigand 1)

Boatswain's Call I (Required:Buccaneer 1)

Chains Locker I (Required:Marauder 1)

Double-planked Hull I (Required:Corsair 1)

Flag Painting Station I (Required:Corsair 1)

Gunpowder Bench I (Required:Brigand 1)

First Aid Station (Required:Rover 1)

Gunner's Quadrant (Required:Kingpin 1)

Iron Capstan (Required:Corsair 1)

Enhanced Repair Kit I (Required:Marauder 1)

Enhanced Repair Kit II (Required:Corsair 1)

Enhanced Repair Kit III (Required:Cutthroat 1)