The Collaborative International Dictionary
Harbor master \Har"bor mas`ter\ (m[.a]s`t[~e]r). An officer charged with the duty of executing the regulations respecting the use of a harbor.
Wiktionary
n. (alternative form of harbourmaster English)
Wikipedia
Usage examples of "harbor master".
And I do feel safe with you, Harbor Master, and with Captain Dahl!
Those in the Harbor Master's office saw the effort which Elder Torkes was forced to make to moderate his own manner.
Oh, I knew I could count on the harbor master: they don't like blown-up ships clogging their channels.
But when his mast stuck fast in the greasy mud of the harbor and his hulk became a hazard to every ship that came and went, the harbor master ordered his men out.
They'd generally have been chucked out by now, but the old harbor master died in the middle of the job and I've never gotten around to finishing it.