Captain’s Noon Report – Under Sea November 12, 2018 - - This morning started amazing, at 6 am Lucy was already here passing close the cages, today not all guests woke up early, just a few and they were ready to jump in.
    Captain’s Noon Report – Under Sea November 11, 2018 - - Today has been much better than yesterday, at least this morning we have seen 5 different sharks, 2 Big females, 1 small female and 2 males.
    Captain’s Noon Report – Under Sea November 10, 2018 - - This morning around 7am we saw the first shark, Jette who got her name last trip, in the ID Book as number 253.
    Safety and Guest Experience Shine at Guadalupe November 14, 2018 - - Nautilus Liveaboards runs a very safe and very fun trip. From the first moment I stepped foot in a shark cage, I was comfortable and relaxed.
    Big Mommas Show Off Their Ambush Skills November 12, 2018 - - We had breaches left and right, one after another. It almost seemed as though the sharks were showing off and reminding us that they can get the bait anytime they want.

    Captain’s Noon Report – Under Sea November 12, 2018 - - This morning started amazing, at 6 am Lucy was already here passing close the cages, today not all guests woke up early, just a few and they were ready to jump in.
    Captain’s Noon Report – Under Sea November 11, 2018 - - Today has been much better than yesterday, at least this morning we have seen 5 different sharks, 2 Big females, 1 small female and 2 males.
    Captain’s Noon Report – Under Sea November 10, 2018 - - This morning around 7am we saw the first shark, Jette who got her name last trip, in the ID Book as number 253.
    Safety and Guest Experience Shine at Guadalupe November 14, 2018 - - Nautilus Liveaboards runs a very safe and very fun trip. From the first moment I stepped foot in a shark cage, I was comfortable and relaxed.
    Big Mommas Show Off Their Ambush Skills November 12, 2018 - - We had breaches left and right, one after another. It almost seemed as though the sharks were showing off and reminding us that they can get the bait anytime they want.

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

A great white swims through excellent visibility at Guadalupe Island

Safety and Guest Experience Shine at Guadalupe

Nautilus Liveaboards runs a very safe and very fun trip. From the first moment I stepped foot in a shark cage, I was comfortable and relaxed.

Lucy the great white shark and her pilot fish

Big Mommas Show Off Their Ambush Skills

We had breaches left and right, one after another. It almost seemed as though the sharks were showing off and reminding us that they can get the bait anytime they want.

Sharks, tuna and mackerel put on a show at Guadalupe Island

Lucy, Shark Breaches and Bucket Lists

I especially appreciated the warm welcome that we received from the crew and other trip members alike, given that this was our first diving experience. You all made us feel right at home, so for that thank you!!