About us

Medusa conceived and patented the fresh water transportation bags in 1988 to meet the anticipated requirement for large-scale water imports to California, as well as to Israel, Jordan and other African communities. At that time others were looking into tanker conversions, pipelines and other irrigation and desalination technologies.

To date, no practical economic embodiments have been developed for the transportation of giga volumes of freshwater.

While some small versions of the freshwater transportation bags have been deployed, bag size and shape have yet to be optimized to make it economically viable. Given the new industrial fabrics and webbing (straps) in the market place, the transportation of fresh water to markets many nautical miles away could be feasible, and significantly cheaper than conservation and desalination initiatives being considered.

Medusa’s goal is to design projects that could provide potable water in many parts of the world, bringing a comprehensive suite of consultants and suppliers with project management expertise, engineering and technical knowledge and financing skills. Interest is currently focused on California.

Waterbag transportation is not new. Medusa uses existing and proven technologies such as commercial tug boats and engineered pumping technologies and stations. Megabags however are specifically designed and engineered based on applications (amount and distance).

The issue is not engineering possibility, it is economic feasibility.

A 2 million tonne fresh water megabag shown in relation to tug boat and 747 jet liner;
approximately 750 meters long, the length of two supertankers

The Name

The name Medusa is used to distinguish our bags from other types of bags developed.

From 1960 there is the Dunlop Dracone bag invented by Prof William Hawthorne of Cambridge. These bags are very small (1000 – 2000 CM), relatively long and narrow, strong and expensive, designed to be towed at about 8 knots. At this speed the front end lashes around in the water resembling a sea serpent (dracone in Greek). The intended function is to move fuel oil for military use. Some 500 have been made over the years.

The Medusa bag is very different, designed to be much larger, wide, flat and thin. It is towed at low speed (2.5 – 3 knots), without any bow yawing. Ocean swells are absorbed and pass through the bag. In this respect, the bag resembles a gigantic jelly fish. Variants of “medusa” are the names for jelly fish in all the major Mediterranean languages.

Intermediate designs of fresh water transportation bags have been proposed by others. These bags hitched together as a train of many round cylinders. These are towed at an intermediate speed. However, the drag, handling, structural issues with these designs and cost cannot approach the cost efficiency of the Medusa bag.

“Medusa bag” is the UN’s recognized term for large fabric water barges; see: UNTerm