Captain’s Noon Report – Under Sea October 21, 2018 - - Dive masters report at least 7 sharks at a time while in the submersibles cages and on the surface we have at least 4 and 5 individuals at same time
    Captain’s Noon Report – Explorer October 21, 2018 - - People say it's a once in a life time experience but we have several guests that keep coming back year after year. It's something you just have to experience yourself.
    Captains Noon Report – Explorer October 19, 2018 - - Explorer - Many sharks! Ropey has been around
    Sharky Encounters and Happy Guests October 19, 2018 - - I'd always thought of this experience as a once in a lifetime one. Now I am already dreaming of coming back.
    120ft+ Visibility at Guadalupe Island! October 17, 2018 - - I estimate in just two days we have seen upwards of 30 individual sharks from 7ft juveniles that were just a couple of years old up to 15ft plus leviathans which could be 15-20 years old!

    Captain’s Noon Report – Under Sea October 21, 2018 - - Dive masters report at least 7 sharks at a time while in the submersibles cages and on the surface we have at least 4 and 5 individuals at same time
    Captain’s Noon Report – Explorer October 21, 2018 - - People say it's a once in a life time experience but we have several guests that keep coming back year after year. It's something you just have to experience yourself.
    Captains Noon Report – Explorer October 19, 2018 - - Explorer - Many sharks! Ropey has been around
    Sharky Encounters and Happy Guests October 19, 2018 - - I'd always thought of this experience as a once in a lifetime one. Now I am already dreaming of coming back.
    120ft+ Visibility at Guadalupe Island! October 17, 2018 - - I estimate in just two days we have seen upwards of 30 individual sharks from 7ft juveniles that were just a couple of years old up to 15ft plus leviathans which could be 15-20 years old!

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 Under Sea

Formerly the Undersea Hunter of Cocos Island and IMAX fame, the Nautilus Under Sea 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 Under Sea is perfect for smaller groups of just 18 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

A great white glides through crystal clear water at Guadalupe. Photo by divemaster Mirko.

Sharky Encounters and Happy Guests

I’d always thought of this experience as a once in a lifetime one. Now I am already dreaming of coming back.

A curious great white swims towards the camera at Guadalupe

120ft+ Visibility at Guadalupe Island!

I estimate in just two days we have seen upwards of 30 individual sharks from 7ft juveniles that were just a couple of years old up to 15ft plus leviathans which could be 15-20 years old!

Lucy the great white shark goes for the tuna

Full Body Breaches and Breathing Underwater

From the cages you could see the anchor chain and we had 4 great white sharks circling the cages and the boat all day long.