Multiple warships and persistent random world map threats.

The enemy has multiple war ships, why can't we?

Allow additional docks specifically for multiple sizes of war ship and convert your transport ships into battle ships via upgrades like the main ship.

Once a ship is converted it can't be turned back into a transport ship, but it can be fully scrapped (decommissioned) for parts.

Have dock sizes of 2,4,6, and 8 just like the cargo ships that can be fitted with more armor, guns, or Logistics (cargo space) accordingly.

Warships and transport ships could be grouped into fleets that would depart together for both player assigned or trade contracts.

Multiple missions could be run on the map at the same time.

Ships on a trade route should be positionally visible on the world map instead of just disappearing on the edge or the game map. Including the addition of travel time to and from a trade resource.

This could allow for a persistent random threat on the world map for distant resources.

Also, warships (Including the main ship) should require ammunition.
(Phosphorous + Salt + Coal = Gunpowder)
(Iron, Steel, or Depleted Uranium + Gunpowder = Gun Shells I, II, III)

Finally, when quick trading with a village, supplies shouldn't magically appear in the dock yard. You should have to assign a ship to the dock yard (which could be your main ship) and send it to pick them up or pay a high resource rate to have them delivered by a ship from the village that comes to your dock.

PS. All transport ships should start as 2 slot ships and require upfitting/down fitting and resources to become 4,6, 8 size frames. (Dock like a Vehicle depot)