Hello,
There is now a Large Mythical Shipyard, 206%, available for public use in A5, Hadsonee Ait by the lighthouse. (There is also a Journeyman Small as well)
All builds should be completed within 48 hours. After 48 hours unfinished builds will be cleared.
There is an open Smithy, Workbenches, and Storage containers if you need them. But they are used at your own risk as they are unlocked to everybody. Plenty of room to sail up and park next to the shipyard for a more secure experience.
The best practice is to make your planks, decks, sails, and a wheel before you start. Then you can build quickly and sail it out of the dock to fit and finish elsewhere.
Enjoy!