Did a crow's nest yell land ahoy?

A crow's nest is a high lookout point on a ship from which a sailor, known as a lookout, can spot land or other ships. While it's not common for a crow's nest itself to "yell" anything, a lookout stationed there might shout "Land ho!" upon sighting land. This phrase has traditionally been used by sailors to alert the crew of approaching land. So, while the crow's nest doesn't literally yell, it serves as the vantage point from which such a call could be made.