This has been partly due to the limited capability of common hydrocast
steel wire, which could not be safely reeled out more than 96000 m, and therefore could not be used to reach the hadal zone.
The third study used the PTB socket with sleeve suspension and compared it with Hydrocast
HS sockets with Pelite liners.
, the movement of ordinary nodes with flow of water is without restraint because they are scattered in the underwater environment.
The author in  proposed the HydroCast
(hydraulic pressure-based any cast) routing protocol to provide a geographic routing solution alternative.
, a benthic (sea-bottom) grab, and a trawl make up one sample.
These studies have evaluated interface pressures with patellar-tendon-bearing (PTB) sockets [17-18,20-21], an unrectified hydrocast
socket , and a total-surface-bearing (TSB) socket .
(hydraulic pressure based anycast routing)  protocol utilizes the depth information (pressure level) of the sensor nodes along with the clustering of the nodes.
These two temperature-depth profiles to depths of about 500 m, obtained from hydrocasts
conducted six days apart, were virtually identical.
were carried out every 3 h from an anchored vessel.
In the sanctuary, this innovation means that shipboard operations, from hydrocasts
to submersible launches, can be conducted in higher sea states than with a comparably sized monohull.