Use of a back support belt is a must during lashing and de-lashing operations and the crew should be cautious while walking around the ship as the vessel's structure could lead to a tripping hazard. It is also important for crewmembers to understand the plan and order of the lashing and unlashing operation. It should be kept in mind that reefer containers always require more attention and co-ordination for plugging and unplugging during loading or unloading operations.