A canopy is crabbing when it is flown at an angle sideways to the ambient wind, resulting in a path across the ground that is sideways as well as forwards
Process used after excess moisture is taken from cloth by the hydro-extractor or whizzer After hydro-extraction, the cloth is stretched to its full width for further treatment, and crabbing performs the function of "setting cloth " Crabbing also "loosens" the goods The material is run over a cylinder roller to prevent wrinkles The cylinders are immersed in hot water, and the cloth rotates for about fifteen minutes The cloth, after an hour or so, is returned to the setting bath under a boiling pressure This gives the required setting Sometimes , hot and cold baths are alternated in the process, dependent on the particular conditions