Since July 26, 1999, it is mandatory to secure containers by using positive container securing devices in the US. Cargo securing devices are mainly used to prevent any loss or damage to the goods that are carried by the ships. These equipment prevent shifting and overloading of cargo and ensure proper ship operation. Different types of container securing systems and devices are semi-automatic twistlocks (SAT),safety stackers,self-handling stacker,eye plate,dove tail base,raised deck socket, flush socket,flush cloverleaf deck socket,lifting socket,double plate,lashing rod,guide cone,counter bearing,sliding twistlock,tope corner,D-ring and clamp. It is important to carry out regular inspection and maintenance of these devices. Components of these devices should be routinely examined and lubricated. http://amplify.com/u/a17ren