I rearranged a few commands, since I was using 'drydock' a little too often.
So the following are now in effect (except for the west pier, where too many
ships were stationed for me to recompile the room :

summoned - a ship has been summoned into the game
docked - a ship is free to be summoned, but has not been yet
drydocked - the ship is locked away in drydock, being worked on. may not be
summoned.

the commands for summoning and docking a ship are now summon/dock (as opposed
to summon/drydock from before). Merchants now rent shipyards not drydocks,
hence you enter with the 'shipyard <plrname>' command now.

If anything bugs, let me know.

Melemkor