Captain’s Noon Report – Explorer October 23, 2018 - - The action has been non-stop since 0930 this morning. I have been on the wrangling platform for the last 90 minutes dancing with two large females and a few males going at the baits constantly.
    Captain’s Noon Report – Belle Amie October 23, 2018 - - Today we saw tuna bigger than yesterday, Geronimo said like a 45 or 50 kgs maybe a little bit more!
    Captain’s Noon Report – Belle Amie October 23, 2018 - - This morning within the first hour of the surface cages being opened we had more breaches than we do on a full day of Guadalupe dives, not sure what was going on but we all enjoyed the action.
    Shark Experts and New Divers Meet Great Whites! October 22, 2018 - - If scars are the beauty of the deep, "Lucy" is Miss Universe! And all the other sharks seem just as in awe of her as we are. She combines an incredible mix of grace and power.
    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.

    Captain’s Noon Report – Explorer October 23, 2018 - - The action has been non-stop since 0930 this morning. I have been on the wrangling platform for the last 90 minutes dancing with two large females and a few males going at the baits constantly.
    Captain’s Noon Report – Belle Amie October 23, 2018 - - Today we saw tuna bigger than yesterday, Geronimo said like a 45 or 50 kgs maybe a little bit more!
    Captain’s Noon Report – Belle Amie October 23, 2018 - - This morning within the first hour of the surface cages being opened we had more breaches than we do on a full day of Guadalupe dives, not sure what was going on but we all enjoyed the action.
    Shark Experts and New Divers Meet Great Whites! October 22, 2018 - - If scars are the beauty of the deep, "Lucy" is Miss Universe! And all the other sharks seem just as in awe of her as we are. She combines an incredible mix of grace and power.
    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.

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 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 dives at Guadalupe, Photo ©Michele Hall

Shark Experts and New Divers Meet Great Whites!

If scars are the beauty of the deep, “Lucy” is Miss Universe! And all the other sharks seem just as in awe of her as we are. She combines an incredible mix of grace and power.

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!