Angle of repose

the natural angle between the cone slope and the horizontal plane when bulk cargo is emptied onto this plane in ideal conditions. A value is quoted for specific types of cargoes, results being obtained from use of a ‘tilting box’. The angle of repose value is used as a means of registering the likelihood of a cargo shift during the voyage.

An angle of repose of 35° is taken as being the dividing line for bulk cargoes of lesser or greater shifting hazard and cargoes having angles of repose of more or less than the figure are considered separately.