Leadsman is a pirate on The Walrus in the West Indies.
During the events of Black Sails: Season 3 Episode 9 XXVII. played by James Frost
Leadsman calls out the surface depths to Dooley who then repeats it to De Groot. The Leadsman continues to yell out depths and De Groot tells Captain Flint that both anchors are ready. Flint tells Mr. Williamson to hard to port and to drop the anchors and The Walrus turns to face the Royal Lion. The crew of The Walrus and the Maroons then unload the supplies.