A New Type of Ship


Following is description of an unusual Ship, which has some characteristics of a catamaran, and uses water-jets for propulsion and stabilization.



    This Ship has a large Tube in the middle of its bottom, which connects its front and its back. There are large openings into that Tube both in the front and in the back of the Ship.

The Ship is symmetrical – it is designed to move either way: “forward” or “backward”. Front and back are just temporary designations to indicate direction of movement. This Tube in the middle of it is its main feature. Water naturally comes into this Tube, and from it, water is pumped into jets to move the Ship.

    Since water from the Tube goes through machinery, it has to be filtered; hence there are series of filters, where the Tube meets external waters (in the front and in the back of the Ship). In these places the Tube is flared-up and opened to the bottom that filtered out staff could be immediately moved down out of the Ship. The removal is assisted with automatic brushes.

    To control flow of water in the front and in the back of the Tube there is a set of inflatable bags just behind the filters. They do not need to provide a tight closing of the Tube, just an obstruction for water flow. Only bags on the “current back” of the Ship are deployed, when needed.



    All jets are fixed in place; only speed of water flow through them is controlled.

Two jets are needed on the back of the Ship: left and right to turn the Ship. For reliability, it is better to have them in double - four jets on the back.

    Also, there are symmetrical four (inactive) jets on the front.

    To improve maneuverability, we place small jets on the right side of the Ship: two on the back of the Ship and two on the front. They send water to push the ship from right to left.

    Also, there are four jets on the left side of the Ship.

    The next set of jets is unusual – they send water down. They are used to tame Ship’s oscillation front-to-back and right-to-left. They are set on Ships perimeter, only a few of such jets are needed and they do not need to be powerful, but they have to be computer controlled and they should react fast. This set of jets is used also to tilt the Ship into a turn, like a bicycle, not as a usual Ship.

    There are structural weaknesses in the Ship:

-   where nozzles of jets open up into outside of the ship

-   where water is taken into Ship’s hydraulic system from the Tube to be pushed into jets,

-   tubes of the hydraulic system traversing the Ship.

They all have to be encapsulated into water-tight compartments to localize any possible leak.

    Pumps, feeding the jets should be next to the Tube in the middle of the ship to enhance ship’s stability.


Observation and Illumination


    There is no need for any kind of “structure” on top of the Ship: it is elevating center of gravity of the ship and it is vulnerable in case of bad weather. Modern observation and communication equipment can provide all needed information to the captain and the crew.

Similarly, there is no need for windows in the Ship – modern inexpensive to operate lighting equipment and abundance of screens and speakers provide sufficient substitute for them.

    One needs to place observation, communication and visual signaling equipment high above the Ship and one needs visible indication of the Ship’s dimensions for other ships. Hence the Ship needs four masts on its four corners. When the Ship is small, one mast in the middle of the ship or on one of its corners could be sufficient.

    Masts should be telescopic, that they could be collapsed for protection or repair. To make masts more reliable, each should consist of three telescopic legs. In the case of only one mast in the middle of the Ship, it should consist of four telescopic legs.



The bottom of the Ship could be almost flat and it does not need the keel. The sides of the Ship also could be flat or almost flat.

The Ship could look like a box with openings into the Tube in its front and back. This is particularly suitable for a container ship.




    The Ship should be able to withstand high oceanic waves rolling over its top without damage or flooding. It means its top should be water proof, when it is closed, and the Ship should rely on fully developed air conditioning system.    

Ballast tanks should be used to regulate how low the ship sits in the water.


Coordination with Waves


The Ship of this type not only pushes itself using jets, it also pulls itself by sacking water into the Tube on its front.

This sacking of water in the front of the Ship reduces the height of the wave in front of it and its resistance to ship’s movement. The wave on the back of the Ship exerts pressure on the Ship, which pushes it in the right direction.

    The Ship monitors this varying pressure in both places, in front and in back, and adjusts its “sacking” and “pushing” accordingly. It varies speed of water through the jets and degree of blocking the water flow in the Tube by inflatable bags. This improves efficiency of Ship’s propulsion system.


Fully Submersible Variant


The ship could be designed as fully submersible. In this case, it does not need masts and its shape should be like a tube, not like a box.

Propulsion jets should be placed in front and back: toward top, toward bottom and one toward each side of the ship.

Pairs of maneuvering jets should be placed on top, bottom and sides of the ship. One jet of the pair should be placed on the front and another on the back of the Ship.

External manipulators could be added to facilitate underwater operations. 


Muscle Powered Small Ship


A small ship of this type could be propelled with muscle power. Each member of a team could be pumping hydraulic liquid with legs using reciprocating pumps. The flow of hydraulic fluid produced by the team is used to drive all the water jets and an air compressor facilitating air conditioning in the ship.

Small submersible ships, designed for two persons, could be used for flexible underwater construction and maintenance. They could use manipulators driven by the Ship’s hydraulic system.




This ship is stable – the Tube, full of water in the bottom of it, lowers its center of gravity. It is highly maneuverable. It is quiet.

Pumps moving water through jets could be driven directly or indirectly by muscles, electric motors, internal combustion engine, etc. and source of power could be switched as needed.

This ship could use narrow “landing canal” dag up in a shore. It can go into it on arrival and back out of it on departure. This is a useful feature for a ferry.


Alexander Liss 3/20/2019 – 6/16/2019