The Seven Waves is a heavy construction vessel capable of operating in water depths of up to 2,500m.

Primary Information

  • Length 145.9m x breadth moulded 29.9m
  • Service Speed: 13.0 knots
  • Accommodation: 120 persons
  • 550t top tension VLS
  • AHC crane: 400t @ 16.5m
  • 2 x work-class ROVs

Pipelay Systems

The vessel is fitted with two underdeck storage carousels, with a capacity for 2,500t and 1,500t of product. A vertical (tiltable) lay system (550t top tension capacity) is permanently installed for deployment of a range of flexible products with a diameter from 100 to 630mm. The lay tower can operate at up to 10° and is fitted with two tensioners, each of 275t capacity which can be retracted clear of the firing line, and with two wire centralisers.Two A&R winches are fitted of 600t and 200t, both with 2,500m of wire. The moonpool is designed to hang off products up to 600t and is fitted with a mechanism to allow the product to be rotated under full load