Container ship operation: Care of lashing materials and cargo securing devices
When containers are carried on deck, the ship is required to be approved for that purpose and the containers themselves are secured with twistlocks and lashings. These usually consist of steel rods and turnbuckles. Lashing pattern to be followed on board is detailed in the vessels cargo securing manual.
Fig: typical pattern of container lashing using steel rod and turnbuckles
Fig: Dangerous cargo lashing caused stowfall
When containers are carried below deck, the containers are slotted into cell guides on a cellular container ship. When carried within a cell guide framework, no further external support is generally required.
When 20’ containers are stowed below deck in 40’ cell guides it may be necessary to over-stow the 20’ containers with a 40’ container. The Cargo Securing Manual should be consulted before loading.
Vessels lashing requirement as per the cargo securing manual must be informed to the terminal staff, stevedoring company as required and if necessary copies of the Lashing Patterns must be provided.
There must be a clear understanding as to the vessels lashing requirements in order to avoid delays and non compliance with cargo securing requirements.
Unused cargo loose securing devices after discharging containers must be stowed away safely in designated lashing bins on deck. After cargo operations are complete, it must be ensured that no loose securing devices are lying on container tops, hatch covers or such places so as to pose a potential threat of injury or damage.
Ships lashing gear must be well cared for and crew must always be vigilant to avoid loss of lashing material. These are mainly lost due to pilferage, damage, gear being left on the quay and not returned on board and twistlocks remaining on discharged containers carried away to the yard.
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