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Nautilus Undersea (90 Departures)

from 1450 GBP
  • Boat
  • Boat
  • Dining seating
  • Salon
  • Dining Area

The UnderSea first entered service in 1968 as the personal submarine tender to Dr. Perry of Perry Oceanographic. This sturdy and brave ship became one of the most famous dive boats in the world as the Undersea Hunter voyaging out to Cocos Island and in IMAX adventures around the South Pacific. The ship was graced with a massive shipyard refit including: stretching the hull out to 105 feet, a new superstructure and extended sun deck, a bulbous bow and stability system.

DEPARTURE

20 Jun 2025
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 28 Jun 2025 View Route Itinerary
from 1854 GBP
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6 Jul 2025
Orcas - Sea of Cortez 11 days / 10 nights
8 days/7 nights returning 13 Jul 2025 View Route Itinerary
from 2060 GBP
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20 Jul 2025
Orcas - Sea of Cortez 11 days / 10 nights
8 days/7 nights returning 27 Jul 2025 View Route Itinerary
from 2141 GBP
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8 Aug 2025
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 15 Aug 2025 View Route Itinerary
from 2177 GBP
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15 Aug 2025
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 22 Aug 2025 View Route Itinerary
from 2339 GBP
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23 Aug 2025
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 30 Aug 2025 View Route Itinerary
from 2177 GBP
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10 Sep 2025
Sea of Cortez 7 Night Classic
6 days/5 nights returning 15 Sep 2025 View Route Itinerary
from 1450 GBP
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20 Sep 2025
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 27 Sep 2025 View Route Itinerary
from 2177 GBP
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27 Sep 2025
Sea of Cortez 7 Night Classic
7 days/6 nights returning 3 Oct 2025 View Route Itinerary
from 1737 GBP
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11 Oct 2025
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 18 Oct 2025 View Route Itinerary
from 2177 GBP
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14 Dec 2025
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 22 Dec 2025 View Route Itinerary
from 3066 GBP
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22 Dec 2025
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 30 Dec 2025 View Route Itinerary
from 3066 GBP
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15 Jan 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 23 Jan 2026 View Route Itinerary
from 2703 GBP
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9 Apr 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 17 Apr 2026 View Route Itinerary
from 2946 GBP
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17 Apr 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 25 Apr 2026 View Route Itinerary
from 2703 GBP
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25 Apr 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 3 May 2026 View Route Itinerary
from 3026 GBP
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3 May 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 11 May 2026 View Route Itinerary
from 2703 GBP
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11 May 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 19 May 2026 View Route Itinerary
from 2703 GBP
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27 May 2026
Orcas - Sea of Cortez 11 days / 10 nights
5 days/4 nights returning 31 May 2026 View Route Itinerary
from 1895 GBP
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31 May 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 8 Jun 2026 View Route Itinerary
from 2622 GBP
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16 Jun 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
9 days/8 nights returning 24 Jun 2026 View Route Itinerary
from 2622 GBP
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24 Jun 2026
Socorro Giant Mantas, Dolphins & 12 Species of Sharks 11 days / 10 nights
12 days/11 nights returning 5 Jul 2026 View Route Itinerary
from 2946 GBP
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5 Jul 2026
Orcas - Sea of Cortez 11 days / 10 nights
8 days/7 nights returning 12 Jul 2026 View Route Itinerary
from 2177 GBP
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12 Jul 2026
Orcas - Sea of Cortez 11 days / 10 nights
8 days/7 nights returning 19 Jul 2026 View Route Itinerary
from 2177 GBP
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19 Jul 2026
Orcas - Sea of Cortez 11 days / 10 nights
11 days/10 nights returning 29 Jul 2026 View Route Itinerary
from 2986 GBP
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29 Jul 2026
Orcas - Sea of Cortez 11 days / 10 nights
11 days/10 nights returning 8 Aug 2026 View Route Itinerary
from 2986 GBP
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8 Aug 2026
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 15 Aug 2026 View Route Itinerary
from 2218 GBP
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15 Aug 2026
Orcas - Sea of Cortez 11 days / 10 nights
11 days/10 nights returning 25 Aug 2026 View Route Itinerary
from 2986 GBP
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25 Aug 2026
Sea of Cortez 7 Night Classic
6 days/5 nights returning 30 Aug 2026 View Route Itinerary
from 1491 GBP
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30 Aug 2026
Ultimate Whale Sharks in the Sea of Cortez 8 days / 7 nights
8 days/7 nights returning 6 Sep 2026 View Route Itinerary
from 2218 GBP
Select Cabin

TRIP INCLUSIONS

  • Full Board Accommodation
  • All Meals, Non-alcoholic Beverages and Snacks
  • Use of Kayaks and Stand-Up Paddleboard
  • Tanks, Weights and Belts
  • Aluminum 80’s and Air
  • Daily Room Service and Towels
  • Dive Guide Services
  • End of trip slideshow DVD
  • On-board facilities such as the hot tub and lounge

TRIP EXCLUSIONS

  • Port Fee of $35 per person
  • Airport Transfers
  • Crew Gratuities
  • Bar (Alcoholic Drinks)
  • Dive Gear Rentals
  • Mexican Taxes
  • Wi-Fi Access On-board
  • Nitrox is available for $120 per trip
  • National Park Fees $100 per day
  • Private Dive Guide
Vessel Specifications
Year Built / Refurbuilt: 1968 / 2017
Length: 105 ft long
Beam: 24ft
Top Speed: 9.5 knots
Cruising Speed: 9 knots
Max Guests: 19
Number of Cabins: 9 cabins
Water Capacity: 6000 gallons
Fuel Capacity: 8000 gallons
Freshwater Maker: 1800 gallons/day
Amenities: Fully-stocked extensive bar (single malts, micro brews, a great selection of wine)
Communication: Internet access and satellite phone
Safety: ISM Safety System Certified, Fire Safety, Sprinkles, Emergency Exits, Night Watchmen
Built: Heavy steel construction with stabilization designed for ocean crossings
Available: Designated Smoking Section
Electric Outlets: Standard North American outlets that put out 110 volts


Diving Facilities
Air Compressors: 2 x water cooled Coltri MC-30
Equipment Rental: The equipment rental prices listed above are per person per day and are payable aboard before your departure
Dive Deck: Dive deck with personal gear lockers
Tenders: One 22 ft. heavy duty fiberglass dive boats One 17 ft. rigid bottom inflatable
Tank Fills: Air fills, nitrox, rebreather friendly
Camera Tables: Large space for everybody to get their photo gear ready before diving


Equipment Information
15L Tanks: $65 per trip
BCD: $70 per trip
Dive Computer: $50 per trip
Fins: $30 per trip
Mask : $25 per trip
Nitrox: $120 per trip
Regulator: $70 per trip
Wetsuit: $70 per trip
Full Equipment: $320 (with: Wetsuit, BCD, Dive Computer, Regulator, Fins, Snorkel + Mask)

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