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Marine civil engineering and geotechnical drilling contractor Seacore has finished building a navigation aid on St Agnes in the Isles of Scilly.

The transit day mark is a painted masonry wall anchored down to the granite bedrock.

Built on the Tins Walbert rock outcrop on St Agnes for client Corporation of Trinity House, it is one of several schemes to help sailors navigate in the area.

Seacore's Skate IV jack-up platform was towed to site and jacked up on the rock outcrop to act as a selfcontained access and working platform. The first stage was to cast and anchor the ground beam into the granite.

The 6m wide reinforced masonry wall, shaped like the gable end of a building with a 7m high ridge, was then built. Its north-westerly face was painted brilliant white with a central vertical black stripe from the base to the ridge, allowing it to be clearly seen up to 8km away.

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