Palmer trestletree

One of the Palmer's trestletrees with a block still intact lies on the seafloor. The trestletree attached the mainmast to the topmast of schooners, which allowed the ship to hoist a mainsail and a topsail on each of her masts. Image courtesy of NOAA/NURC-UConn/The Science Channel.

Related Links

Steamship Portland Exploration

Steamship Portland Exploration: Sept 17 Log

NOAA Ocean Explorer Gallery