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Nautilus UnderSea


Built in Florida in 1968 and used as a research vessel for Perry Oceanographic, the 29 metre Nautilus UnderSea (formally the Undersea Hunter in Cocos Island) offers 5 night itineraries to get up close and personal with the Great White Sharks of Guadalupe Island.

With only 9 cabins accommodating 18 guests, the UnderSea offers space and comfort, together with the exceptional Nautilus hospitality and incredible diving experiences in unique destinations which are at the top of most divers’ bucket lists. With over 25 years experience in big animal diving, the Nautilus UnderSea is the perfect choice for your next diving adventure.

The Nautilus UnderSea is also now wheelchair friendly, with the entire main deck being wheelchair accessible including the dining room, lounge and dive stations with a ramp down to the lower swim platform.

How to get there
The port town of Ensenada, in Mexico, where the liveaboards for Guadalupe Island are berthed, is very easily reached. A popular air routing for Guadalupe trips is to San Diego, in California. We recommend you take one night’s accommodation there prior to the liveaboard. From San Diego, the liveaboards offer a courtesy bus transfer across the Mexican boarder (they will take care of visas for you) and the journey time to Ensenada is about 2.5hrs.  Another option is to fly to Tijuana, and from there you can take a bus to Ensenada. We will happily advise which option is best for you and to give all the details.

Guide price for 5nts on the Nautilus UnderSea from £2200pp*
Includes: Return transfers from airport to liveaboard, 5 night’s accommodation on board in a triple Stateroom, all meals, non-alcoholic beverages, snacks, daily room service, towels, in-water divemastering, and onboard facilities. Price also includes 5% Mexican Tax. 

Not Included: International flights, port & park Fees US $65.00 per person payable in cash onboard, gift shop purchases, bar tab, gear & tank rentals, Nitrox, crew gratuities.

*Price shown is for guide purposes only and is based on low season travel and for lowest cabin type. Please contact us for a confirmed cost based on your preferred duration, cabin choice and time of travel.

Exploring Mexico
Mexico offers world class diving on both its Pacific and Caribbean coastlines. There is something for everyone here, and at all diver levels. Visit our Mexico section for an introduction to where to go throughout this country, including Guadalupe Island, the Sea of Cortez, the Socorro Islands and the Yucatan Peninsular.

Quick Guide: Nautilus UnderSea

  • Length 29m
  • Max 18 passengers
  • 1 Triple Cabin
  • 6 Staterooms
  • 1 Wheelchair Accessible Stateroom
  • 1 Premium Suite
  • Recommended diver level: PADI Open Water (or equivalent) for the submersible cages, but there is no diver qualification required for the surface cages



All cabins have individual climate control, private ensuite bathrooms with hot shower, toiletries and fresh towels. The twin Stateroom cabins are located on the Lower Deck, 5 of which have a queen size bed and single upper-bunk. The triple cabin is located on the Main Deck, has a porthole window and 2 bunk beds, with 1 of the bunks used solely for extra storage. The Emerald Premium Suite is located on the Upper Deck and has a huge king bed, which can be configured into two large twin beds on request, a flat screen TV, multiple windows and easy access to the hot tub. There is also the large ADO Rosario Stateroom which is located on the main deck adjacent to the dive deck and is wheelchair friendly with 2 twin beds and huge window.

There is plenty of space on the Undersea to relax between diving. There is a large sundeck with comfortable sun loungers, hot tub and sociable bar area, an air-conditioned lounge located on the main deck where you will find big cosy sofas, TV, stereo, slide projector, DVD player and Multimedia Sony VAIO Laptop computer, or you might prefer to curl up on a sofa with one of the books from the onboard library.

The dining area and bar are located on the main deck with the lay-out making for sociable meal times. Excellent food is served on board with a varied menu of western and local dishes.

The huge dive deck located at the back of the main deck has ample storage with personal lockers for each diver, together with a large camera table and charging points. On Guadalupe itineraries, there is 1 surface shark cage and 2 submersibles to get you up close and personal to the great white sharks. All certified divers will have the opportunity for a minimum of three dives per day in the submersible cages and unlimited time in the surface cages. Surface cages open at 6.30am and diving in the submersible cages begins at 8.00am. Both are available until dusk.

Day Trips and Tours

Stay a bit a longer

Guadalupe trips are not particularly easy to combine with other diving spots, but there are endless possibilities for extending your stay. If you choose to travel via San Diego, then adding a domestic flight to see other regions of the United States is very straightforward and quite cheap. Popular choices are to head over to visit the Grand Canyon National Park and Monument Valley, or Los Angeles or San Francisco. The choice is yours!

For flights via Tijuana, then staying on in Mexico is your best option. This is a wonderful country to explore. You can head inland to the countryside, or to visit Mexico City.

If you did want to add on something that included diving, then you could – if you are happy to allocate a full day of travelling – consider flying over to the Yucatan Peninsular, where you can dive the Cenotes Cave systems, Cozumel and visit ancient Mayan ruins.

Whatever you may fancy adding on to your Guadalupe trip, we will be happy to guide you and to assist with all your travel needs.

Mexico by region



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Adrenalin-fuelled cage diving with great white sharks



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Socorro Islands
Schooling hammerheads, humpback whales and huge oceanic mantas



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Sea of Cortez
Playful sea lions, bull sharks and close encounters with whale sharks



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Yucatan Peninsular
Cenotes cave diving, reef walls of Cozumel and ancient Mayan ruins

Ready for your next adventure?

Great Escapes Diving Holidays Ltd

Combs Tannery
Tannery Road
IP14 2EN
United Kingdom

Office hours: Mondays to Fridays, 9am - 5pm
Tel: 01449 535010

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