Page 21: of Maritime Reporter Magazine (July 2000)

be severely damaged if left unrepaired.

Extensive oxy-arc underwater cutting on the required blade, which measured 97-in. with an 8-in. thickness.

Working around-the-clock, the team was able to suc- cessfully complete the job despite obstacles as bad weather and underwater currents. Following this, M/V

Neptune underwent sea trials where it was discovered that the vibration had been eliminated and the vessel was able to move on to its destination carrying its con- signment of containers.

Circle 86 on Reader Service Card

Prop Shaft Misalignment Causes Near Miss

During the recent sea trial of an oil tanker, it was observed that the temperature of the intermediate shaft bearing increased to an alarmingly high value. Subse- quent to this, the engine's operation was ceased so that an investigation could be conducted. Although no dam- age to the shaft bear- ing occurred, there was excessive loading of the bearing - even though checking in cold condition had shown good align- ment compared to calculations.

It was found that heating of the underlying waste oil was the reason for increased loading. The tank was fit- ted with heating coils so that the temperature could remain between 50-60 degrees C. For reasons unknown, this tank had been heated in excess of 100 degrees C. In turn, the thermal expansion of the steel structures had caused lifting of the shaft bearing, which then increased loading of the shaft bearing.

Litton Marine Aids In Conversion

Litton Marine Systems supplied electronics equip- ment for three former vehicle ferries being converted into cable laying ships for Global Marine Systems.

Each vessel was equipped with dual interswitched

Decca Bridgemaster E 340 X-band and S-band ARPA radars, a BridgeMaster E 250 docking radar, LMX 406

GPS receiver and twin Sperry Marine gyrocompasses with repeaters. The conversions were carried out at Cammell Laird.

Circle 87 on Reader Service Card

Norshipco, Metro Machine Team Up

Norshipco and Metro Machine have agreed to a teaming arrangement — enabling the two companies to raise the level of services provid- ed to the U.S. Navy. The partnership between

Norshipco and Metro provides the Navy with the private sector capability and capacity in the

Norfolk, Va. homeport to undertake large com- plex repair jobs, while concurrently performing other scheduled Navy repair work. Additional- ly, the teaming agreement provides both com- panies with enhanced flexibilities in the use of their respective facilities - pertaining specifi- cally to the more efficient scheduling and usage of the drydocks - and the ability of each com- pany to achieve specialization in the parties' area of expertise. Despite the joint agreement, each company will still maintain separate core capabilities.

A&P Falmouth Gets Major Tanker Refit

Scheduled to have entered A&P Group's Falmouth facility this past June for major refit and repair work is the 26,218-gwt vessel Trogir.

A member of the fleet of tankers managed by Novo- ship U.K., Trogir, which is the ninth of the company's

T-Class tankers to undergo work at A&P Falmouth in the last three years.

The tanker's workscope includes pipework, alarms, indicators, steelwork and painting.

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