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Business Segment: Commercial Marine
Project Description: Offshore research vessels have been using large, heavy blocks to lay fiber-optic research cables. These cumbersome blocks require multiple technicians to move them into position, which can result in damage to the cables. The goal was to reduce the manpower required to lay cable and reduce the chances of damaging the cable in the process.
Solution/Equipment Used: Using lightweight, extremely strong materials, Harken designed an alternative block. Not only is it light enough to be handled by a single operator, but the reduced block weight allows it to align to the cable payout, decreasing the potential of damaging the cable. The sheave diameter accommodates the cable’s large-bend radius, while the throat is wide enough for the wire terminals to pass through.
Materials were selected for their low-corrosion, high-strength properties. Their self-lubricating characteristics also reduce static buildup.
Summary: Harken Industrial Oceanic Cable blocks are used on research vessels to safely lead data cables and towed objects overboard. At only 19.3 kg (42.5 lb), the 500 mm (20″) sheave-diameter block is light enough for a single operator to optimize cable tracking.