Explorer was atRoca Partida

Water Temp75℉/24℃

Visibility100ft/30m

# of divesYesterday: 3

Belle Amie was atEl Canyon

Water Temp76℉/24℃

Visibility80ft/24m

# of divesYesterday: 4

Undersea was atThe Boiler

Water Temp76℉/24℃

Visibility70ft/21m

# of divesYesterday: 4

    Captains Noon Report – Undersea July 18, 2018 - - Location: 30 26.7N-117 31.1W,88 nm to go Weather: NW 5-7 kts and 2-4 ft seas,Sky partly cloudy Good afternoon. On the first crossing to Guadalupe Island the weather is very good. All guests are excited to see the First Great Whites of the season. Stay tuned more to come! – Capt. Mantarey
    Captains Noon Report – Belle Amie July 4, 2018 - - Belle Amie - The day dive was relaxing and the night dive was excellent. We are planning on one more dive after lunch before we head to Cabo
    Captain’s Noon Report-Belle Amie July 2, 2018 - - Belle Amie-We finished the day yesterday at Roca with some great baitball action,thousands of skipjack tuna and hundreds of yellowfin tuna all around the divers. We also had a whale shark, friendly dolphins, hammerheads, more galapagos sharks than you could count and much, much more.
    The History of Guadalupe Island July 21, 2018 - - Welcome to Guadalupe Island! Situated in deep water off the continental shelf of North America, the history of Guadalupe Island is rich with Spanish and Portuguese explorers, pirates, gold and the Manila galleons, rapacious American and Russian sealers and fur traders. We love Guadalupe Island and hope that you will come to feel the same way. This volcanic island is estimated to be 8 million years old!!
    First Shark Sighting Within 10 Minutes! July 19, 2018 - - The first bait in the water by 6 am and the surface cages opened to guests at the same time. Just 10 minutes after the first bait was put in the water a 12ft male great white shark showed up and passed close by the bait a few times. Then five minutes later, it came back to try and grab the bait with a good breach right in front of the surface cage! This, of course, made everyone excited and all the guest started to get ready quickly and asked for the surface cages.

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 Liveaboard Diving Boat
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 Liveaboard Dive Boat
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

Our new Gallant Lady is beautiful and combines the luxury of a Broward yacht with thoughtful liveaboard dive boat design. This 113 foot yacht features 6 large suites, accommodating 12 guests, and 1700 horsepower along with hydraulic stabilizers, speeding you wherever you want to go.

Latest Blog Posts

Shark Breach

First Shark Sighting Within 10 Minutes!

The first bait in the water by 6 am and the surface cages opened to guests at the same time. Just 10 minutes after the first bait was put in the water a 12ft male great white shark showed up and passed close by the bait a few times. Then five minutes later, it came back to try and grab the bait with a good breach right in front of the surface cage! This, of course, made everyone excited and all the guest started to get ready quickly and asked for the surface cages.

White Tip Sharks in Socorro, Photo by Howard Hall

Socorro Highlights Part 3

Just to have that privilege of diving with the big Pacific mantas and sharks, wow! The last day of diving in the Sea of Cortez, La Reina was so amazing, with nice rock formations, and sea lions swimming around you.

Divers check out a giant manta, photo by Dan Orr

Socorro Highlights Part 2

Our first 2 dives were at El Canyon. On the first one, our check-out dive, as soon as we got in the water, a group of five dolphins showed up and with them was the baby dolphin that we have been seeing on the last couple of trips. After the dolphins, we saw a couple hammerheads and three mantas that were swimming around us all the way to the safety stop.