Safety reinforced cofferdam

On November 2010 and berthed alongside Port of Motril (Spain),  TSE diving team proceed to prepare and installing a safety reinforced cofferdam together with a temporary afloat repair of the collision damages hole on the general cargo vessel of 5.570 DWT.

Close-up underwater cctv-video inspection together with Owners Superintendent and Class involved representatives were taken in order to determine the dimension of damaged located on starboard side nº 2 HFO tank between frames 26 to 33 and taken measurement in order to fabricate one open safety reinforced steel cofferdam.

Technical divers prepared one hand-made steel template structure of 5 meters length x 3 meters high in order to fabricated the reinforced open structure cofferdam.

TSE diving team preparing and supporting the fabrication of the reinforced steel cofferdam of 5 meters length x 3 meters high x 1 meter wide x 5 mm steel plates with appropriates reinforced beams and fitting the gasket foam of 50 mm x 45 mm.

Divers welders prepare the surface shell plating in order to welder of a total 3 in number certified steel rings to secure the open reinforced cofferdam and 2 in number steel dogs in order to placing and secured the cofferdam with a total of 5 in number chain-blocks of 2 tons each.

In two hours divers placing satisfactory the open reinforced cofferdam and by means of electrical pumpsd divers removed the sea-water inside the open cofferdam and confirm the dry atmosphere to start with the internal afloat repairs.

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After approx 24 hours non stop of internal temporary repairs and approved by Owners Superintendent and Class in attendance, divers removed the open cofferdam and carried out a close-up inspection of double welded plates covered the total length of the damaged area as per a completely satisfaction of Owner´s and Class surveyors.

Internal repairs was concluded and confirmed approval of "permanent" repairs were satisfactorily concluded to a satisfaction of DNV Surveyor and Owner´s Superintendent.

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