One Liveaboard, Pioneering Diving Since 1971

Southern California and San Diego has been described as the birthplace of the diving industry. Since 1971 we have been at the forefront of this industry leading extraordinary scuba expeditions and liveaboard dive charters to the Channel Islands, Baja, Guadalupe Island and beyond. Founded by the husband and wife team of Lou and Sandy Grivetto, the Horizon Charters of today only slightly resembles the original version.

Our commitment to diver safety and environmental protection are hallmarks of the company today. Exploration and adventure lead us in 2000 to be the first commercial liveaboard company to introduce liveaboard shark cage diving at Isla Guadalupe in Mexico, an event that fundamentally changed the way the world views, interacts, and cage dives with great white sharks.

Join America’s Shark Boat for your next liveaboard scuba expedition in Southern California and beyond. Our vessel history and company DNA sets us apart from any other vessel in the region. We’re the liveaboard vessel you call home, and the dive crews you’ll soon call friends.

Let’s dive!

Isla Guadalupe great white shark diving is a liveaboard charter for Isla Guadalupe in Mexico. It is ideal for