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 distinguish it

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.