- "She's a fussock, she is. Fat and slow."
- ―Edward Thatch, on El Arca del Maestro, 1715.[src]
El Arca del Maestro (English: The Ark of the Master) was a Spanish galleon used by the French Templar Julien du Casse in late 1715. The ship was a gift from Grand Master Laureano de Torres y Ayala, to help further the Order's goals in the West Indies.
That same year, Edward Thatch and Edward Kenway planned to commandeer the galleon and station it just beyond Nassau's northern harbor, to improve the community's defenses. Kenway's Jackdaw tailed the vessel through a storm, during which the Man O' War repelled an assault from Charles Vane's Ranger.
El Arca del Maestro subsequently docked at a cove on the island of Great Inagua. Looping around the island, Kenway made his way through the jungle and assassinated du Casse aboard the galleon. Afterward, Edward claimed the cove as his own, while Thatch took the ship's cannons and beached the ship itself at Abaco Island.