TRACK AND VEHICLE SYSTEM FOR A FISH CAGE

摘要

A track 2 comprises first and second elongate flexible members 4 and 6. A flexible net 8 extends between the flexible elongate members 4 and 6 to form a track. A tractor 20 comprises a body 26 housing drive means (not shown) such as an electric motor. First, second and third wheels 22a, 22b and 22c are mounted on respective axles 24a, 24b and 24c and are arranged to be driven by the drive means. As a result of the use of elongate flexible members 4 and 6 and a flexible fabric 8, the net 2 is flexible and can be deformed into any desired shape. The track 8 can therefore be threaded through wheels 22 such that the wheels 22 rest under gravity on lower flexible elongate member 6 to retain the tractor 20 on track 2. Overlap by all three wheels into the net allows the tractor to clamp itself to the net.