B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
B63C11/34—Diving chambers with mechanical link, e.g. cable, to a base
B63C11/36—Diving chambers with mechanical link, e.g. cable, to a base of closed type
B63C11/38—Diving chambers with mechanical link, e.g. cable, to a base of closed type with entrance above water surface