Poseidon Resorts: How to build an Underwater Hotel

The Poseidon Resorts are offering dining and overnight stays on a lovely tropical island near Fidji. That wouldn’t be too unusual if you would leave out the following fact: The resorts are located on the ground of the islands lagoon in somewhat 20m (60ft) depth.

     Visitors are able to spend a great deal of their stay behind large egg-shaped windows enjoying the marine wildlife and colorfulness of the coral reefs. You could say, they spend their vacation on the bottom of the ocean.

      The resorts are made of a completely new designed sea bottom assembly. This structure combines lessons learned from early undersea observatories with today’s new materials and improved technical knowledge. Early designs of sub sea habitats like Coustau’s Conshelf and the US made SEALAB have been build for trained staff with a military duty. Poseydon Resorts on the other extreme offer any luxury needed. Moreso, 60% of its surface is covered by acrylic windows letting the light and colors from the outside in.

poseidon_resort_pod_outside_view
The PODs upside are predominantely made of acrylic windows

The PODs upside are predominantely made of acrylic windows

    In 2006 Hydrosight was asked to help build these windows. The challenge was unique: To make spherical windows of several meters diameter. Casting and forming of the windows had to be completed in a reasonable time. The facilities would need to handle 400 metrictons of acrylic in a relatively short span.

     Since the Coup’ in Fidji, where the projected holiday island is located, financing has been stoped. After all we hope that we have been valuable for the projects’ early calculation and assessment thesis. We would most definitely love to see Poseidon Resorts happen on its second go.

Poseidon Resorts: Entire Assembly from Above

Poseidon Resorts: Entire Assembly from Above

      Each Visitor staying overnight will spend the night in a so called Pod, that looks a bit like a heavy underwater version of a helicopter without blades. A core specification of the Pod.

Width 5.000mm
Length 10.000mm
Height (NI lift shaft) 3.800mm
Weight (NI ballast) 50 Tonnes
Displacement 120 cm
Metacentric Height -50mm (NI ballast)

PUR external UW w360

Restaurants windows’ FE analysis

Restaurants windows’ FE analysis


Restaurant internal stiffeners

Restaurant internal stiffeners


Categories: News and Examples, Underwater Engineering
Created: 5 December 2006
Last Modified: 10 December 2013

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