According to Adam Edwards of Daily Express, the wolf-whistle originates from the navy General Call made with a boatswain's pipe. The general call is made on a ship to get the attention of all hands for an announcement. Sailors in harbour would whistle the general call upon seeing a sexy, attractive woman in order to draw fellow sailors' attention to her. It was eventually picked up by passers-by, not knowing the real meaning of the whistle, and passed on.[better source needed] Doubt was cast upon this explanation by lexicographer Grant Barrett who noted that it was very thinly supported during a 2015 broadcast of A Way with Words.