Dedicated, unmanned, subsea or subaquatic tools used for installation and inspection, maintenance, and repair (IMR) tasks that require a handling capacity beyond that of free-swimming ROV systems.

A submarine or subaquatic ROV which is a nearly neutral buoyancy submarine that is manipulated from a surface platform by an umbilical.

Subsea infrastructure class that contains classes of artefacts which are structures.

Suction piles are a form of fixed platform anchor in the form of an open bottomed tube embedded in the sediment and sealed at the top while in use so that lifting forces generate a pressure differential which holds the caisson down

A device that is made as a tool to be used for a subsea or subaquatic purpose.

An umbilical for subsea or subaquatic use between a surface platform and subaquatic equipment or installation.

Is an artefact intended to collect a heavy phase by making use of gravity.

The external fabric of a building that is visible above ground.

Equipment used to direct surface water flow.

A physical object that is protecting against a large but momentary increase in the voltage of an electric circuit.

A check valve that is a check valve where the closure member is a disc which swings freely on a hinge and which opens automatically when flow is established and closes automatically when flow ceases or is reversed.

A switchgear and controlgear bearing a set of switches for connecting and disconnecting the various circuits of an electrical system, as of a telegraph, telephone, etc.

A physical object that is a general term covering switching devices and their combination with associated control, measuring, protective and regulating equipment, also assemblies of such devices and equipment with associated interconnections, accessories, enclosures and supporting structures.

An artefact joining two parts so that one or both can pivot freely (as on a bolt or pin).

An instrument panel dedicated to a particular system.

An object designed for performing functional requirements and serving as a specification for equipment

A vessel intended to contain fluid for storage. Typically a receiving or collecting function for further distribution. Typically with a vertical and cylindrical or square shape and a flat or conical bottom.

A fluid regulator that controls the flow of liquid or gas from a pipe or container. Taps are often attached to a sink or bath.

A device that transfer data between a computer and a magnetic tape.

In a communications network, a network node equipped for interfacing with another network that uses different protocols.

A physical object that converts sound signals into corresponding variations of electric current (or potential), which is transmitted by wire or radio to a distant point where it is reconverted into sound.

A detector intended to detect temperature.

A detecting element intended to sense temperature.

A gauge that is intended to measure and indicate a temperature.

A physical object that detects temperatures; records, modifies and/or displays or performs a combination of these activities.