Your sailor guilditems have been upgraded with 'gangway remote-control'. As
that sentence implies, you can control your gangway from anywhere now. It uses
whatever is set as your 'default' ship, if you have more than one.
Note that your crew won't say anything if they can't execute the command for
some reason - this is because it is a lot more work to determine if you are on
board or not, in order to decide whether or not to echo the error messages (I
am quite sure those of you who have first mates, etc that run the ship do not
want to be spammed with <every single> raising and lowering of the gangway).
I intended to provide this functionality for the hatch as well, however that
requires more work to code up as well, due to how the hatch reads in commands.
Since the hatches aren't used anywhere near as frequently, I'll leave that for
a later project.