Blohm + Voss A.G. of Hamburg (U.S. representative is Blohm + Voss Company of Springfield, N.J.) recently delivered the heavy-duty floating derrick Tog Mor to Howard Doris Ltd. of London. With a Stuelckenmast of 900 tons capacity, the vessel is said to be a "first" for this type of cargo-handling equipment.
The Tog Mor is a thruster-assisted floating derrick for inshore lifting operations. The Stuelcken design has been well proven on heavy-lift vessels worldwide. It has unique capabilities for heavy lifts at substantial outreach, with corresponding high lifting capability. The Tog Mor, classed + 100 A4 Heavy Floating Derrick by Germanischer Lloyd and meeting the requirements of the U.K. Department of Trade, will normally operate in conjunction with a Voith Schneider tug of 3,000 bhp.
The main hook (fixed boom position) has a maximum lifting capacity over the stern of 900 metric tons, with lifting height of 234 feet 7 inches at corresponding maximum outreach of 118 feet. Lifting capacity is 450 metric tons at lifting height of 110 feet 11 inches and maximum outreach of 237 feet 10 inches. The auxiliary hook has a capacity of 50 metric tons at any outreach to 296 feet.
All loading operations can be performed by one man in the control cabin, which is installed nearly 33 feet above the platform deck. Additionally, a remote control allows operation from platform or main deck as well as from the top of one of the masts. Even at a list of 8 degrees of the pontoon, all operations can be carried out safely.
During a voyage the boom is lashed in a nearly upright position, leaving the entire deck area free for possible transport of very big units even over long distances. Converting the derrick from the sealashing condition to the operating mode takes only a few minutes.
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