Abstract: A subsea inspection vehicle which is intended to be remotely operated comprises a substantially cylindrical pressure vessel (1). A pair of generally arcuate buoyancy tanks (8) and external equipment (3,7) are supported on the vessel (1) in a manner arranged such that the vessel remains substantially astable. A plurality of thrusters (16,18) are carried by the vessel (1) and are arranged to enable movement of the vessel (1) relative to all six degrees of freedom provided by its astable configuration. The vessel can be moved in any direction at any attitude of pitch, roll or yaw and can thereby emulate the flexibility of movement of a diver.

Abstract: A magnetic particle inspection system includes apparatus for applying a magnetic field to an inspection area of a metal structure. This apparatus comprises a power cable arranged in at least one cable inspection loop to which electrical power is connected. In this way the adjacent inspection area is magnetized. The inspection aea is sprayed with disclosing fluid and an ultra violet light illuminates the sprayed area. The length of the cable inspection loop is adjustable so that the area of the inspection area can be varied. The apparatus is particularly designed to be mounted on a remotely operated vehicle.