you go to the island on the top right and there is a shed to upgrade and change
This is a very long answer. go to poptropicasecrets.com. It has videos to help.
You repair your ship by pulling into any harbor. You can upgrade your ship at the ship builder's at Dragon Cove.
first you get money and upgrade your ship for 1000000 to the warship then you go and find the map after that you go and defeat captain crawfish
You upgrade your ship in the hangar after you buy a ship. Well you cant exactly upgrade your ship you just get lasers and stuff like that.
you have to buy membership for poptropica.
In order to fire cannons, you must upgrade the raft to a ship with cannons and you must be on the sea. Make sure you have a ship that shoots cannons. Just set sail in the ocean and click to fire the cannons.
at the dragon cove in skullduggy island
You go to Dragon cove, and buy your ship from the ship guy.
The ship you signal is the ship that gives you the island medallion.
the alien ship is at the knight place
How do i start the space ship in poptropica astro night island
you open the door of the ship in poptrpoica