Captains Noon Report – Explorer December 10, 2018 - - Explorer - A large pod of false killer whales also crashed the dive site
    Captain’s Noon Report-Belle Amie December 8, 2018 - - Belle Amie: Both dives have delivered some good action, schooling hammerhead sharks, galapagos, mantas, mobulas, silky sharks and much more. On the second one some of the guest saw galapagos sharks hunting.
    Captain’s Noon Report – Explorer December 7, 2018 - - The divers encountered large school of hammerheads 50-100 reported, as well as 3 circling Mantas above. Everyone was beyond thrilled but not beyond words.
    Guests Enjoy Giant Mantas and Greek Night! December 10, 2018 - - I can't believe the wildlife we saw: mantas on nearly every dive, hammerheads, schools of jack, and more whitetips than I know I'll ever see again.
    The End of Our Best Guadalupe Island Great White Shark Diving Season Ever! December 8, 2018 - - We have now identified over 300 individual white sharks in the bay that we dive in. And most astonishing of all, we had trips with 3 dive days in which we saw over 50 different great whites.

    Captains Noon Report – Explorer December 10, 2018 - - Explorer - A large pod of false killer whales also crashed the dive site
    Captain’s Noon Report-Belle Amie December 8, 2018 - - Belle Amie: Both dives have delivered some good action, schooling hammerhead sharks, galapagos, mantas, mobulas, silky sharks and much more. On the second one some of the guest saw galapagos sharks hunting.
    Captain’s Noon Report – Explorer December 7, 2018 - - The divers encountered large school of hammerheads 50-100 reported, as well as 3 circling Mantas above. Everyone was beyond thrilled but not beyond words.
    Guests Enjoy Giant Mantas and Greek Night! December 10, 2018 - - I can't believe the wildlife we saw: mantas on nearly every dive, hammerheads, schools of jack, and more whitetips than I know I'll ever see again.
    The End of Our Best Guadalupe Island Great White Shark Diving Season Ever! December 8, 2018 - - We have now identified over 300 individual white sharks in the bay that we dive in. And most astonishing of all, we had trips with 3 dive days in which we saw over 50 different great whites.

Our Values – Our Culture

Nautilus boats are built for Safety
Built for Safety

Most divers would be shocked if they knew what was going on in the engine room and below decks of many liveaboard diving ships. Safety is not something to ever take lightly. We live and breathe safety with obsessive compliance to our Safety Management System under the watchful eyes of our external auditors. See our passenger and safety certificates here.

Our commitment to safety >

Luxurious Liveaboard Diving
Excellence in Guest Experience

Captain Mike has led the way for the last twenty-seven years in consistent and relentless obsessive attention to detail, and making every trip as excellent as possible. That attention to detail shows up everywhere, from each dive briefing, to the choice of dive sites, to dinner service, to the quality and thread count of our Egyptian cotton bed sheets. We never stop stressing over the details. We never stop trying to do even better.

Our guest experience >

Hostess Marcella pours drinks at the bar
Happy Crew, Happy Ship

A happy crew makes for a happy ship and the very best in guest experience. The men and women on our ships come from around the world and share your passion for Mother Ocean. Every one of our seventy crew and thirty-five shoreside support staff in Mexico and Canada are committed to doing the best they can for you, our guests, and that shines through like a bright beacon of happiness.

Meet our crew >

Choose from 4 stabilized, ISM safety certified ships

Nautilus Explorer 2018
Nautilus Explorer

Canadian shipyard built from the keel up with a thoughtful design intended to support operations from the chilly current swept waters of Alaska to the equatorial heat of Clipperton Island. Recently lengthened to 132 ft, the Explorer was the world’s first SOLAS safety certified dive boat.

Nautilus Belle Amie 2018
Nautilus Belle Amie

The “Belle” is our newest ship, launched in 2015. At 147 feet she is a big, beautiful and very popular liveaboard that is more like a small ship than a dive boat. Guests enjoy ultra-quiet rooms, spaciousness and comfortable, stabilized crossings.

Nautilus Under Sea Liveaboard Diving Ship
Nautilus UnderSea

Formerly the Undersea Hunter of Cocos Island and IMAX fame, the Nautilus UnderSea is one of the most beloved live aboard dive boats in the world. With a new full-width superstructure, enclosed dive deck and lengthened to 105 ft, the UnderSea is perfect for smaller groups of just 19 divers.

Nautilus Gallant Lady near shoreline
Nautilus Gallant Lady

Our new Gallant Lady is beautiful and combines the luxury of a Broward yacht with thoughtful liveaboard dive boat design. This 116 foot yacht features 6 large suites, accommodating 12 guests, and 1700 horsepower along with hydraulic stabilizers, speeding you wherever you want to go.

Real-time Ship Locator

Latest Blog Posts

Dancing dolphins at Socorro. Photo by Sandra Haessler

Guests Enjoy Giant Mantas and Greek Night!

I can’t believe the wildlife we saw: mantas on nearly every dive, hammerheads, schools of jack, and more whitetips than I know I’ll ever see again.

A giant manta poses in the blue. Photo by Andreas Marohn

An Explosion of Marine Life at the Socorro Islands

All groups enjoyed several mantas, a school of about fifty hammerheads came out of the blue into The Canyon, and as usual the cleaning station did not disappoint with a parade of mantas, dolphins, juvenile silvertips and Galapagos all at once.

A whale shark at Socorro. Photo by Uwe Simon

International Guests Weigh-In on Guadalupe, San Benitos and Socorro

An unforgettable trip to Guadalupe to cage dive with Great Whites followed by diving with Sea Lions at Cedros/San Benedict then the Magnificent Mantas around the Socorro group.