Anthrax and Megadeth are the latest additions to Motorhead's Motorboat Cruise festival.
The boat-based festival will be the first rock festival to take place in the middle of the ocean, with a line-up that so far includes Motorhead, Megadeth, Anthrax, Zakk Wylde, Danko Jones and Fireball Ministry. The boat will set sail to Key West in Florida and Cozumel in Mexico from Miami on 14 September.
"This will be everything you've come to expect from a night out with us, except even louder, with more great bands and no way of escaping!" says Lemmy the founder of Motorboat. "If you thought waves could rock a boat, you've got another thing coming with this lovely little outing!"
"There never has and never will be another cruise like Motorboat cruise," added Megadeth's Dave Mustaine. "Come on a thrashing voyage with Motorhead, Megadeth, Anthrax, Zakk Wylde and all Lemmy's friends. This is the coolest way to ever see a metal concert."