Port Shipmaster
This NPC buys and sells vessel upgrade equipment, there are typically Shipmasters at the Pirate and Naval bases, but also at the Utopian port. Additional Shipmasters
Port Master
This NPC sells you new vessels, the list of vessels available primarily depends on your rank. This means that new players will not be able to buy a Warship the moment they start out.
Port Storekeeper
This NPC buys and sells in vessel cargo such as spice and silver, mainly the loot you gain from sinking enemy ships.
Faction Promoter
Promotes you within your faction, depends on how much fame you have gained.
Routemaster
After capturing an island you may gain access to a routemaster who can establish a trade route from the captured island to your Navy/Pirate base.
More to follow …