Apparatus comprising a vehicle such as a sledge containing a reel, bin, or the like, holding casing material folded flat, is disposed for travel immediately over an underwater object or piece ground to be covered and is towed by a surface vessel. Situated behind the supply of casing material, relative...http://www.google.es/patents/US4480943?utm_source=gb-gplus-sharePatente US4480943 - Method and apparatus for laying underwater coverings
Method and apparatus for laying underwater coverings
