Naval Battle is a challenge in Gridlock Canal. It is unlocked by killing all ten Ship Captains with a cannon. TipsEdit All Ship Captain's wear a white sailor cap. It may help to purchase a cannon from the arsenal section before going to Gridlock Canal and starting this challenge, as you have to pass some Captain's before you reach the first cannon in the area. One of the Ship Captains.Add a photo to this gallery Retrieved from "https://cactusmccoy.fandom.com/wiki/Naval_Battle?oldid=10607" Categories: Challenges Cactus McCoy 2: The Ruins of Calavera Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.