Jospa’s tug is a patented disruptive technology that opens new Ocean Solutions

Zero Fuel Costs

Moving the Jospa Tug onto the ocean will require fuel. From then, The Jospa Tug does not require any fossil fuel, as PV panels + battery back-up, centered on the pilottug, provide communications and control power.

Zero Pollution

A direct consequence of zero fuel.

Remote Unmanned Operation

Designed to be remote- controlled, there will not be any crew. In its first years groups or arrays of tugs may be operated by local service vessels. When the IMO (International Marine Organisation) permit fully autonomous operation, the tug will be operated via satellite.

Jospa Tug – Core Technology

Flowing from its Research and Development into wave power to produce electricity - WECs “Wave Energy Convertors” - Jospa’ s founders invented a wave-powered ocean-going tug with strong ‘bollard pull’. Inexpensive to build and maintain, it is A DISRUPTIVE INVENTION. It arrives when world shipping is under massive commercial and compliance pressures on costs and emissions.



“Wave orbital motion”, at bottom, drives fins forward or backward depending on their position wrto the wave crest at any moment, and enables use of either horizontal or vertical fins as suits the application


Orbital Motion

As Orbital Motion has been known about for some time, but such a tug was not conceived of before now as there are a number of essential requirements, discovered by Jospa and described below, without which the Orbital Motion could not be effective.

Jospa tug

As it is wave-powered, costly fuel and emissions do not arise: as it is unmanned (remote-guided), the costs of a crew are also saved. At some time soon “autonomous” – unmanned, remote- controlled via e.g. satellite, -operation, as is also now being planned for autonomous cars, will be permitted. The “Jospa Tug” concept has been proven (and advanced to “TRL4” in technical terms), protected by European and US patents. The tug potentially competes in all ocean-shipping modes. Initially it must prove itself in applications where its slow speed is desirable.

How to make ”orbital velocity” work

  • 1

    “Jospa’s Technical Director explains orbital motion (using Jospa’s WEC as example) “

    Surprised? Waves can travel over immense distances, but the water itself shows little horizontal movement; the energy of the wave is transmitted, not the water. The water moves in circular orbits, with the diameter of the orbit equal to the wave height.

  • 2

    A “tug” length greater than 1 sea-wavelength i.e. crest to crest

    A structure flexible enough to conform with waves (the Plastics Harvester is also largely submerged and has active storm mitigation measures, but they are not related to the Orbital propulsion)

    Jospa Solution

    For e.g. the Atlantic the tug is about 175m long Reinforced flexible rubber or elastomer hose ca. 300mm OD

  • 3

    One Direction Fins

    A restraint acting on the fins in one direction

    Jospa Solution

  • 4

    Why is the Pilot Tug needed

    The tug may ‘snake’ a little when idling as its fins flap freely, so a small pull from the Pilot aligns them and initiates the wave propulsion. The Pilot holds batteries charged by PV cells mounted on the tug, with controls and telecoms equipment. Its propeller(s) are electrically powered.

    Does it pull the Jospa Tug?

    The Pilot controls the direction of the tug to follow automatic or manual headings. Normally it uses very little power but at times battery power will enable change of direction or pull the tug for a limited period, e.g. turning.

    jospa's tug

NOTE – VERTICAL OR HORIZONTAL FINS? – Both use the same orbital forces. While configurations are still being examined, the vertical mode is best for the Plastics Harvester and most applications.

Powered by waves , the Jospa tug provides major bollard pull. It carries photovoltaic panels and batteries for controls and communications. It is remote-controlled – no crew. The design is repetitive, so it has low capital cost as well as its minimal operating costs. No pollution, of course. The build is structurally flexible, it is largely submerged: together with active protection, it is very survivable. A completely new concept for hauling loads in the oceans (not for inshore), it particularly provides solutions where its slow speed is an advantage, when fossil-fuelled tugs, with their costs and pollution, are unaffordable, and unacceptable, thus opening new marine markets.

View The Applications