Heavy grains, Soya beans and Sorghums (HSS). This expression is used in chartering and in grain trading to mean any type of grain coming Within a variety of descriptions, and having an average Stowage Factor (S.F.).
Wheat is a heavy grain, having a S.F. of from 44 to 49. Soya beans have a S.F. of from 48 to 52 and . Sorghums also from 44 to 49. The lower the S.F. the higher the density of the grain, so these cargoes are generally heavier than the lighter grains such as barley and oats. HSS cargoes are exported mainly from the U.S. Gulf and North American Pacific ports and from the River Plate ports.