An offshore support vessel sailed from her shore base on a routine supply run to her designated oilfield. Her deck was loaded with a variety of tubing, casings, pallets, tool boxes, food containers and one large unpacked wooden cable reel, weighing about 11 tonnes. The reel was stowed with its axis fore-and-aft and was pre-slung with an extralong 12 mm steel wire sling passed through the very narrow central hole, which precluded threading any other securing rope or chain through the coil.
The sling was unsuitable for securing, so the ship’s crew secured the reel by pushing wooden wedges under it and tightening a chain around its girth. Additionally, the vessel’s tugger wire was tensioned at the reel’s mid-height. Soon after sailing, the ship rolled and pitched heavily in a gale, and the accelerations imposed large forces on the lashings. Suddenly, a link in the chain parted and the tugger wire instantly became slack. Subsequent movements displaced the wedges and the bridge watch observed the reel moving freely on the deck.
The Master was called, speed reduced to minimum and heading altered into the sea and swell. With the ship now pitching gently, the crew managed to throw some square timber (4×4’s) across the path of the runaway reel path and gradually regained control over the hazardous situation. A dunnage ‘grid’ was quickly nailed around the base and the reel remained safely inside this while the crew re-tightened additional wires and chains. About an hour later, the reel was safely lifted off by the offshore installation to which it was consigned.
1. Unpacked wooden cable reels, especially those with a very narrow central hole, cannot be effectively secured and must be shipped only in containers or skids;
2. Cable reels made of steel with exposed cross-members or spokes may be shipped unpacked, but must be secured with sufficient number of lashings (chains or wires) and wooden wedges as determined from the vessel’s approved Cargo Securing Manual (CSM) or as per the guidelines contained in the IMO publication Code of Safe Practice for Cargo Stowage and Securing (CSS Code);
3. Packing a cable reel inside a timber and plywood skid before shipping on a vessel offers an effective and economical method for safer carriage by sea.
Source: Mars/Nautical Institute