Abstract
This chapter provides an overview of the state of the art for subsea remote intervention and vehicles, remote operated vehicle (ROV) technologies, and ROV capabilities and requirements for subsea operations. ROVs and remote-operated tools (ROTs) are required to carry out subsea tasks that divers cannot reach. An ROV is a free-swimming submersible craft used to perform subsea tasks such as valve operations, hydraulic functions, and other general tasks. An ROT system is a dedicated, unmanned subsea tool used for remote installation or module replacement tasks that require lift capacity beyond that of free-swimming ROV systems. Generally, ROVs are used for these issues, which are detailed in the following sections: site survey; drilling assistance; installation assistance; operation assistance; inspection; and maintenance and repair. An ROV system used in subsea engineering can be divided into the following subsystems: control room on deck for controlling the ROV subsea; workover room on deck for ROV maintenance and repair; deck handling and deployment equipment, such as A-frame or crane/winch; umbilical to power ROV subsea and launch or recover ROV; tether management system to reduce the effect of umbilical movement on the ROV; ROV for subsea intervention.
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