The CTD curve during the bottomsupported measurement in December
2011.
site, the AUV will foat on the surface
and send the position information to
users for recovery.
According to the designed measuring modes, the following information
during cruising would be acquired:
several CTD trapezoid data profles
within a depth of 100 meters along the
route, with a minimum space interval
of the profles (maximum 400) up to
1 kilometer (much higher than the
measuring line density of a research
vessel), 100 layers of current profles
with the maximum range of 200 meters and a depth variation curve within
sitioning and pressure modifcation, and send the data via
satellite. Upon reaching a preset position underwater, the
water chamber will be injected and then sink to the bottom,
where GPS positioning will be conducted again. Continuous bottom-supported measurement will begin when the
AUV reaches the seabed.
At the preset rising time, the load will be released, and
the AUV will ascend and make a return voyage. During the
return, the platform will make cruising profle measurements along the original route. Upon reaching the recovery
200 meters.
In the bottom-supported measurement mode, continuous data at 100 meters depth for 72 hours can be obtained, including about 50 layers of current profles, average depth of water, seabed temperature, conductivity and
water level.
The variation characteristics of local tides and currents
can be analyzed based on the data. Moreover, the water carried in the ballast tank of the AUV could be used as a sample
for local water quality analysis.
www.sea-technology.com
MARCH 2013 / st
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