The USS Enterprise in the 23rd century used the sound of a boatswain's whistle to open shipboard communications via the ship's intercom. (Star Trek: The Original Series) Aboard starships into the 24th century, it was normally used when an honorary guest comes aboard or at a crewmember's funeral, when their body was released into space. The shrill whistle was often played before a ship-wide or open frequency communication, usually made by the captain or another senior officer. (TNG: "Where No One Has Gone Before" , "Hide and Q" ) The actual tone of the call has varied, as some captains preferred the distinctive notes of the electronic type over the more traditional metal whistle. (TNG: "Lower Decks" )