The use of remotely operated vehicles (ROVs) by ocean scientists has increased significantly during the last decade. Of particular value and interest is the acquisition and analysis of subsea video images to obtain accurate measurements of seabed features, biota and man-made artefacts.
Video images obtained by ROVs have a variable perspective and scale but this problem may be solved by the use of structured lighting comprising an array of diode lasers. A DOE Phantom XTL ROV has been fitted with a 5-spots diode laser system Abiss, and has been deployed in research
programmes in Plymouth Sound and the River Dart. An important aspect of these programmes is the development and perfection of verifiable measurement and sampling techniques, which may then be employed with confidence in inaccessible and hostile waters.
Underwater Technology is the peer-reviewed international journal of the Society for Underwater Technology. The objectives of the journal are to inform and acquaint the Society's members and other readers with current views and new developments in the broad areas of underwater technology, ocean science and offshore engineering.