Bernd Kohler

DUO 480 Adventure The words: “Instant boat building” take on a new meaning.Watch the video clip: A flat surface is sufficient to build the catamaran. The boat is the open version of my...

DUO 900 Plans For study plans click HERE The DUO 900 is a quick-to-build, open-bridge catamaran with asymmetrical hulls. The boat was designed for a French fighter pilot who lived in Argentina. His...

The ECO 520 is the next catamaran from my jigsaw series. The first was the DUO 480 C. For study plans, click HERE The clue is, that the hulls can be build laying flat on a table. Starting with the...

For study plans click HERE MaXi is a trailer-able catamaran for amateur construction. The beam of the boat is 2,44m. It can have also water ballast. The wing seat adds a tremendous amount of...

The New ECO 55 is a modification of the Original ECO 55. When you buy the new plans you receive the complete set of the original plans plus the details for the new gunter rig and new...

Boats around 8 m (27 ft) are most interesting for the average sailor. The harbor fees, maintenance work, car if the boat is in the limits for road transport and the costs to buy but sure to build*...

Note: This is the full plan, for the study plans click HERE The ECO 6 looks like the ECO55 cruiser, but it is a completely new design. The small increase of only 0.5m and increasing the total...

To have fun on the water a houseboat is a practical solution. The exist already in all possible shapes. Many more house as boat, others more boat as house. Here a bit an other approach. The ECO...

Free plans. To download the file, click HERE Here is an easy to built small dinghy. 2 m (almost 8 feed) long with a weight of 18 kg ( 60lbs light). The boat served us well on our 11 year...

DUO 480C under construction in New Zealand   This design cost me more time than I thought it would, but the result is precisely what I wanted: an easy to built boat with a lot of possibilities...

I have built almost anything that can sail. At the age of 12 my first sail thing, an ice "boat". I used skates which had to be mounted on shoes as runners. Big fun, very fast, only the lake was too...

The DUO 425 was the first parallel rig cat designed for amateur construction. The prototype was shown at the boat show in Duesseldorf in 1984. We have the most experience with this sort of rigs...