Nautilus Under Sea Liveaboard

Nautilus Under Sea Liveaboard

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  • Overview
  • Schedule & Pricing
  • Cabins
  • Amenities
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  • NitroxSurcharge
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  • Equipment
  • Groups or
  • Fleet name
  • Year built1968
  • Length28
  • Width7
  • Capacity18
  • MaterialSteel

Nautilus Under Sea Liveaboard is the smallest boat of Nautilus Fleet. She was built in Florida in 1968 for Perry Oceanographic and used to be a research vessel. Now it’s a perfect liveaboard for small groups.

Boat Interior
Although Nautilus Under Sea Liveaboard is not the largest liveaboard of the fleet, she still has the necessary facilities to accommodate divers comfortably. The yacht has seven guest cabins. Each stateroom supplied with personal hanging lockers, shelves, private bathrooms. All cabins are air-conditioned. For your comfort bathrooms has sockets, suitable for your electronic equipment. The cozy design of a dining room allows conversation between tables. It has numerous of comfortable couches and chairs. The bow section of Nautilus Under Sea Liveaboard offers to enjoy beautiful views of Costa Rica. Boat's lounge is ideal for passing the time in between and after dives. It was perfect sitting places to relax and an entertainment area, that includes slide shows, DVDs, videos, games and more. Also, passengers of Undersea Hunter can enjoy perfect views on the sun deck, which has numerous sun loungers.

Dive Deck
Dive deck of Nautilus Under Sea Liveaboard has plenty of space to prepare for diving. one of its main features is work-deck which is also an extendable crane with a 15-ton lifting capacity. There are enough personal gear lockers for each diver and charging points on boats dive deck.

Nautilus Under Sea Liveaboard safety answers all International Maritime Bureau requirements. There is an emergency first aid kit, an emergency oxygen kit for 3 persons, 18 mini personal diver locator EPIRB. All this ensures Undersea Hunter's reliability.

Facilities for Underwater Photographers
Nautilus Under Sea Liveaboard dive deck is perfect as a workspace for film crews. Also, enthusiasts of underwater photography will find a here number of 110 & 220-volt charging points for their cameras and 14 personal lockers for photo and video equipment. Boat feats perfect for photo projects.

Diving in small groups
Nautilus Under Sea Liveaboard suits for diving in small groups. You will get personal care from a team of instructors. Although the boat is small, she was still all that divers need to feel comfortable on board.

Nautilus Under Sea itineraries include diving at Socorro Island a Guadalupe. This destination a famous between divers for high chances of meeting sharks and dolphins, swimming with giant mantas. One of the main attractions of this area is humpback whales, that are migration from Alaska.

When to go
November and December is the best time to swim with mantas and dolphins. Also, whale sharks are frequently seen at this time of the year. January is about amazing interaction with our favorite giant mantas. You can also expect interaction with dolphins, 10 kinds of sharks and early season humpback whales. Mid January-April is time to meet humpback whales migrate down from Alaska at this time of year to mate and breed. You will see loads of whales on the surface and you will hear them singing when you are in the water. Most incredible of all is the opportunity to snorkel with the whales and sometimes even see them during a dive. May-July is bait ball season. Research indicates that there are giant mantas and more biomass at Socorro during bait ball season than any other time of year. Everything intensifies with more sharks - including schooling silky sharks - schooling hammerheads, whale sharks, lots of tuna and other pelagic fish and even pilot whales.

So if you need perfect various diving, book diving safari with Undersea Hunter Liveaboard. You will get all the comfort of living in small groups, personal care, and safety. Make your vacations unforgettable with a trip to Mexico together with Nautilus Under 

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Schedule & Pricing

Booking process

Booking process


Select the cabin of your choice and enter your personal information. Submit the booking request. Once the booking is processed, you will receive an email notification with all booking details conveniently laid out in PDF.


Our team will contact the liveaboard on your behalf to confirm availability and other booking details. We put your place(s) on hold and get back to you within 24 hours. If there are any issues, we come back to you with alternative options.


Once your booking is confirmed, you will receive an email notification with payment instructions. You then have up to 72 hours to take care of other travel arrangements and process the transaction to secure your reservation.

Payment Terms & Cancellation Policy

Payment Terms & Cancellation Policy

Payment schedule

  • 30% will be required within 3 days after the booking confirmation to secure the booking
  • 50% will be required in 127 days prior to the embarkation date
  • 100% will be required in 63 days prior to the embarkation date

Cancellation fees

  • If you cancel after the booking is secured with a payment the cancellation fee of 30% will be charged
  • 50% will be charged if cancelled in 124 days before the embarkation date
  • 100% will be charged if cancelled in 63 days before the embarkation date
* reserves a right to apply a 5% administration fee to cover credit card & bank transfer processing fees incurred in addition

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CabinsView deck plan


Lower deck
Twin Beds (Bunk-Style)
Max occupancy
2 Guests
Ensuite Bathroom
Ensuite Bathroom
Number of Cabins
7 Cabins
Lower deck. Upper and lower beds. Configuration varies between the 6 staterooms. Ensuites with private showers and individually-controlled air conditioning. Stateroom E (E1, E2) only has one queen bed. Stateroom C (C1, C2) only has two twin beds—é Rosario Suite - adjacent to the dive deck. Wheelchair friendly. Twin beds. Huge window! Ensuite with private shower and individually-controlled air conditioning

Premium Suite

Upper Deck
Twin / Double (Convirtable)
Max occupancy
2 Guests
Ensuite Bathroom
Ensuite Bathroom
Number of Cabins
1 Cabin
A large premium suite on the sun deck can be configured into two full beds or one large bed. Flat screen TV, multiple windows, ensuite, plenty of storage space, individually-controlled air conditioning and easy access to the hot tub

Triple Stateroom

Main Deck
2 Twin Beds + 2 Twin Beds (Bunk-Style)
Max occupancy
4 Guests
Ensuite Bathroom
Ensuite Bathroom
Number of Cabins
1 Cabin
Ensuite with private shower and individually-controlled air conditioning
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