Abstract: There is disclosed a cladding section 8 for mounting upon an elongate underwater member and suppressing vortex induced vibration of it, the section including a unitary plastics moulding shaped to provide a tubular 10 portion for receiving the member, the tubular portion being split along its length at 14 and being deformable to permit the member to be introduced into the tubular portion, and the cladding section having at its exterior at least one feature 12 shaped to suppress vortex induced vibration. Rotational moulding of the cladding section is disclosed. The cladding section has an outer layer 24 incorporating anti-fouling material upon an inner structural layer 26.

Abstract: There is described ducting comprising a plurality of interconnectible elongate ducting components (2, 4) which when assembled define an elongate, longitudinally extending internal channel (22) for receiving a pipe, cable or like elongate member, each ducting component having a shaped inner face (14) with a longitudinal recess (20) such that the components can be assembled with confronting inner faces (16, 18), their respective longitudinal recesses being thereby aligned to form the channel, the ducting further comprising tension bands (6) for securing assembled pairs of components to one another, wherein each ducting component is provided with a transversely extending internal cavity for receiving a tension band, the cavity having two open ends so that the band can pass through the internal cavity of one ducting component and though a corresponding internal cavity of an adjacent ducting component in order to secure one to the other, at least part of the band being thereby contained and protected within the ca