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Nautilus UnderSea

Socorro Islands Liveaboard

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
Located at the southern-most tip of Baja Peninsula, Mexico, are the two towns of Cabo San Lucas and San Jose del Cabo;  collectively known as ‘Los Cabos’. Gateway into Los Cabos is through San Jose del Cabo’s international airport and from there you can choose to overnight either in San Jose del Cabo itself, or in Cabo San Lucas, which is just 40 minutes drive. 

Cabo San Lucas is where the Nautilus UnderSea is moored and on your embarkation day, you will need to meet the crew at the Hospitality suite next to the Tesoro Los Cabos hotel in Cabo San Lucas, anytime from noon onwards.  They will then transfer you to the boat at approximately 8pm.

Guide price for 8nts on the Nautilus UnderSea from £2450pp* / 10nts from £2600pp*
Includes: 8 or 10 night’s accommodation 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, overnight accommodations, transfers, 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 Advanced Open Water (or equivalent) with a minimum 50 dives


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.  Typically, three dives per day are scheduled.

Day Trips and Tours

Stay a bit a longer

There is some great diving to be found around the Los Cabos area and southern Sea of Cortez. If it is just a few days diving with sea lions or such that takes your fancy, then this can easily be arranged from Cabo San Lucas.

If you are looking for a bit more, you can consider the option to transfer to La Paz, which takes around 2.5hrs by minibus. This area has access to some great Sea of Cortez dive sites and is excellent for playful sea lion colonies and large numbers of whale sharks. There is also some great bull shark diving off Cabo Pulmo, which is just under 2 hours drive from San Jose del Cabo.

Whatever you may fancy adding on to your Socorro 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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