Hydrographic survey is the process of gathering information about
navigable waters for the purposes of safe navigation of vessels. It strictly
applies to survey of any navigable waters applied to marine navigation.
Seismic survey. Also known as a seismograph survey is a survey of an
area by means of an instrument which records the vibrations of the
earth. By recording the time interval between the source of the shock
wave and the reflected or refracted shock waves from various formations,
geophysicists are able to define the underground configurations.
Geophysical survey refers to the systematic collection of geophysical
data for spatial studies. Geophysical surveys may use a great variety of
sensing instruments, and data may be collected from above or below
the Earth's surface or from aerial or marine platforms.
An underwater trenching system comprises a closed trenching
system that vacuums up sediment removed during the trenching
operation and deposits that same sediment into the trench, thereby
burying a pipeline that has settled into the trench.
A cable layer is a deep-sea vessel designed and used to lay
underwater cables for telecommunications, electricity, and such. A
large superstructure and one or more spools that feed off the transom
Fiber Optic Cables. A marine cable for a fiber optic waveguide with
regenerator supply. A marine cable for a fiber optic waveguide must be
provided with an electrical conductor for energy supply, in order to
supply energy to the regenerators. For this purpose, the optical
transmission elements are surrounded by a stranded layer of metal
wires with good conductivity, which serve to supply energy.