Page 18: of Maritime Reporter Magazine (March 2002)

Ship Repair

After several meetings with the net- work, an agenda to design and develop a complete repair procedure and system was set forth to present to the shipping industry. The key areas for develop- ment were the habitat, bonding tools and an underwater carbon arc gouging sys- tem for removal of the rope guards and wet welding procedures for the replace- ment of the rope guards.

Miami Diver's European network member fabricated the special heating elements and sensors. To further the development of the bonding system

Miami Diver established an exclusive working relationship with John Gentry of Triton Marine Services in the U.K.

Gentry brought a great deal of knowl- edge and know how as his company works with all stern seal manufacturers.

Special jigs were manufactured by Tri- ton Marine Services to work with the heaters and to function in a wet environ- ment with diver/technician friendly fea- tures to make it more convenient during repairs inside the habitat. The jigs were manufactured to fit a wide range of liner sizes.

The new habitat was designed to be lightweight to permit easier and faster

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Diver seal technician — bonding lip seal locat- ed above, while below the lighting system is the bonding jig. installation along with greater mobility for faster mobilization using a wide variety of transportation options. The system for conventional shafts is designed for universal use on a full range of seal arrangement sizes. The small habitat fits seal arrangements from 480 to 670 mm - the large habitat fits arrangements from 670 to 1,000 mm - both are capable of fitting any stern configuration due to flexibility of the material. A dummy shaft and liner were also fabricated to test each new bag for fit and integrity at a depth of 30 ft. of seawater.

An underwater carbon arc system designed and developed by All-Sea

Enteiprises is used for the removal of welded rope guards. The carbon arc system allows for a much faster removal and easier reinstallation due to minimal prep work or fit up work required during reinstallation once repairs are complete.

Miami Diver conducted the wet weld- ing training and certification for net- work personnel at its Florida facility, while in-house wet welding procedures were developed and qualified and a training and testing system and welder qualification were put in place with

Michael Pett of Hydroweld U.K. using hydroweld FS welding electrodes. The tests were witnessed by six major Clas- sification Societies and the results were a Class "A" wet welding certification.

During the development of the equip- ment, materials and procedures, Miami

Diver and the other network companies sent personnel to B+V Industrietechnik facility in Germany for training and cer- tification in overhaul of Simplex-Seals by bonding.

On September 2, 2001, the new sys- tem was installed and tested on the 137,276-gt cruise vessel fitted with a pod propulsion system. A habitat was specially designed for the azipod propulsion system for the test using the same methodology as the conventional shaft habitat.

The tests were conducted as a precau- tionary operations by the cruise ship operator to ensure the capabilities of the new habitat and to established a time frame for installation, bonding of new seals, and removal

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