/help

When the /help command is used, a list of all commands is displayed in the chat window.

Usage

/help

The text is displayed on a green background and reads, "Usage: /help command [displays the usage message for the command] Commands: /afk /away /back /blackspot /bug /clear /complain /crew /cwho /dnd /emote /fbroadcast /fofficer /fwho /game /gwho /help /info /invite /jcrew /job /me /msg /mute /officer /plank /royalty /say /shout /speak /tell /think /unmute /vessel /vwho /who"

Further using /help with another command gives more detailed information.