So the challenge to both improve image quality and reduce survey operational costs in deeper water continues. According to its manufacturers, the system offers operational effectiveness which is almost independent of water depth. And, by eliminating the umbilical system of traditional ROVs and towbodies, the AUV operates with greater freedom and positioning capability. Due to recent advancements in surveying techniques, today's pipeline selection process is no longer left to guesswork. Instead, sophisticated images of seabed topography and profiles allow pipeline operators to thoroughly analyze a variety of irregularities which may compromise an optimum route.
Currents also warrant further evaluation when detected along the pipeline route.
Route changes or pipeline design changes required to pass around or over these features are expensive. Nevertheless, they are often the economic solution due to the extreme high cost of modifying the seabed topography, he says. Methods As the world's search for hydrocarbons continues at increasing depths, the necessity for more sophisticated pipelaying vessels and techniques has never been greater. Global Industries, Ltd. has shown a similar commitment to investing in deepwater technologies. In 1994-5 the company upgraded its barge Chickasaw with a dynamic positioning system, vertical departure angle stinger, and other equipment for deepwater operation.