Rough Seas?
No Problem!
Hull-up for fast transits – Hull-down for the stability of a semi-submersible
Original Concept Sketch – Hull Up.
This is the high speed transit mode using water jet propulsion with a difference, obtaining high transit speeds saving time and money.
The Submersible Hull Catamaran has the characteristics of a high speed ferry, allowing very fast transit times (around 50 knots or 90Km/h) but stable workability in rough conditions (about 5 m or 15 ft seas). Working stability while maintaining the capability to travel at normal passage speed and have normal access to berths in a port.
This vessel has a wider beam than most catamaran ferries of similar overall design. This provides a very large internal space which makes the vessels very comfortable both for working and for relaxation.
Possible Uses Include:
Maintenance of Wind Farms in 90% of weather conditions.
Full field platform crew changes (dispense with helicopters).
Cable laying – work in 90% of the weather.
Hydrographic and Geophysical surveys, slow speed stability.
General platform re-supply.
Small diameter reel pipelay in 90% of weather conditions.
Placement of light lifts on the seabed.
Installation of wave or tidal arrays.
Emergency access to stricken vessels in rough weather.
Rapid response for oil spill containment.
Scientific research.
Installation and servicing of telecommunications cables.
Drill rig support and drill pipe carriers.
Weapons platforms or littoral defence vessels.
Helicopter carriers / assault vessel.
Accommodation vessels for hook up and commissioning.
2D, 3D or OBC seismic surveys.
Oceanographic research and equipment deployment / recovery.
ROV inspection services.
Shallow water loading / offloading capability.
Original Concept Sketch – Hull Down.
That is what a submersible hull vessel does. It jacks up on the vertical members while ballasting down on the hulls.
This allows the high energy wave to pass between the hull and the superstructure significantly reducing vessel movement and greatly increasing workability.
Manoeuvring in both modes is also by water jet method (shown in sketch as azimuth thrusters but these are not necessary with the new water jet systems).
Please click the “Variants” tab for some design possibilities.
An ideal vessel for use in the offshore industry.
Partners and Investors.
Opportunities are available for partners and/or investors with the right contribution at this stage of the project, which is the initial design and testing of the concept.
There are so many applications for this concept, in both mono and multi-hull vessels, and it is scalable from small inshore vessels to super tankers, so there are opportunities within a number of maritime sectors.
Some low level investment opportunities do exist, however we welcome enquiries from major investors for the build stage where considerable investment will be required.
There are also opportunities to partner with companies or individuals that have the expertise, skills or capabilities to take this forward.
If you have something to offer in any of these categories please contact us.
Enquiries from Naval Architecture students needing a subject for their thesis are also invited.
Development Team
Dennis Knox.
Consultant – Offshore Energy, Oil and Gas Installation and Construction.
Senior manager with extensive experience in the oil, gas and energy industry and worldwide experience.
He is the Principal and founder, of OSSeas Consulting, an experienced based senior consultancy for offshore and coastal developments.
Dennis has been a mariner for forty years, and for the last twenty four years has been in the offshore oil gas and energy installation and construction industry and engaged on more than forty projects in almost every sea area of the world.
He has been involved in some of the worlds largest oil and gas projects.
An entrepreneur and inventor the Submersible Hull Vessel Concept is just one of his inventions.
OSSeas Ocean Survey, Sciences and Engineering Associates
Email: office@osseas.com
Albert Sedlmayer.
Founder, director and Naval Architect at Sedlmayer Associates Pty Ltd, (Australia), Developing super-yacht designs, incorporating hydro-dynamic, structural and aesthetic optimisation, ship design contracting and marine consulting.
With over four decades experience in the design of boats, yachts, ships, complex ship-board and marine structures, and architecture.
Sedlmayer Associates Pty Ltd resolves design challenges to the highest design efficiency, optimising aesthetics, performance, function and structure to client’s requirements.
The Society of Naval Architects and Marine Engineers.
The Naval Architectural Society (New Zealand).
Past founding Co-director of the Maritime Referral Group Ltd.