| 摘要 |
<p>A method and system of surveying or monitoring an underwater feature (32), such as a reef, coral colonies (32a,b,c)..or other benthic habitat, includes using a remotely operated underwater vehicle (ROV) (12) tethered to a surface vessel (14) by a tether (16) incorporating discrete positional coordinate determination and/or relay means (40). The ROV (12) is able to be controlled by a controller (28) to revisit the same positional coordinates of one or more parts of the underwater feature because the tether device provides to the surface vessel to record the unique positional coordinates of the part(s) and the ROV is thereafter able to be accurately repositioned at the part(s) at a later time or date. This aids accurate ongoing surveying or monitoring of a feature for changes.</p> |
