A Luxury Submarine Tender

Thunderbird 2 is built to shadow superyachts with a three-person Triton submersible.

January 8, 2015
Brilliant Boats Thunderbird 2
Brilliant Boats Thunderbird 2 Brilliant Boats

Brilliant Boats and BB Yacht have delivered Thunderbird 2, a 70-foot superyacht shadow boat designed to carry a three-person, 8-ton, Triton 3300/3 submersible.

Thunderbird 2 has a hydraulic platform built to launch and recover the sub as well as other toys, as well as to handle the array of battery chargers, oxygen stowage and transfer systems required to use the submersible.

Fully loaded, Thunderbird 2 has a draft of less than 3.6 feet, giving her access to many locations that are too shallow for superyachts. She is built in lightweight aluminum with an interior of balsa, honeycomb and Forex.


Interior décor is by Miami-based Karine Rousseau with two cabins for a total of four guests. A day head, office and entertaining spaces are on the main deck. Insulation reportedly keeps sound levels on the lower-deck accommodations at 65 decibels — the level of normal conversation — at full speed. On the main deck, noise at full speed reaches 72 decibels.

Power is a pair of 900-horsepower Yanmar 8SY engines paired to Hamilton 521waterjets, providing a top speed of 22 knots and transatlantic range at 10 knots.

A sistership is now being built with delivery available by summer 2015. Learn more at


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