Compasssmith
A compasssmith is a person who makes and sells compasses. It is one of the few words in the English language to have three consecutive s's.
The first compasssmiths were the ancient Chinese, who were the first to ever put to use the Earth's magnetic field; but not as a navigational aid, but rather as an amusement. The compasssmith would cast an arrow as he would dice. This arrow would point north, impressing the audience.