Publication Date:
2017-12-19
Description:
A recently developed deep-sea telemetry (DST), based on the digital subscriber
line technology, has been successfully used to equip various remotely operated underwater
devices with online video control, high-speed data transmission, and power
supply via standard coaxial cables with a length of up to 8,000 m. The system has
been applied to study and sample the extreme saline and high-temperature conditions
of the Red Sea brines and to detect gas emissions at abandoned wells in the North
Sea. In both applications, it has been integrated into a water sampler rosette, providing
live video streaming and internal recording from commercial high-definition and
analog cameras as well as simultaneous data transmission from a suite of sensors to
record and sample the distribution of dissolved gases (e.g., methane and CO2) and
oceanographic parameters. This combination makes an ideal survey and monitoring
tool for leak detection even in harsh subsea environments. The DST has also been
used to deploy landers at selected spots at the seafloor. In combination with remotely
operated vehicle (ROV) deployments, this technique can be used to increase significantly
the efficiency of ROV bottom time during deep-water operations. The high
quality of the video transmission, ease of operation, and versatile application make
this novel system superior to existing conventional analog transmission systems.
Type:
Article
,
PeerReviewed
Format:
text
