ROV UMBILICAL

Video Monitor or video suite including a video switcher, video recorders and monitors are connected to the Surface Control Unit. The ROV's camera(s) are routed to the monitor(s).

The Hand Controller used by the ROV pilot to 'fly' the ROV as he views the video monitor and other sensor information displayed on the video overlay, is connected to the Surface Control Unit by a 5 metre lead. All of the vehicle's control functions are incorporated in the Hand Control Unit. These include camera pan and/or tilt, autopilot functions, thruster trim controls, speed, direction, dive, surface and lighting intensity. Spare capacity for additional control functions is included.

An Umbilical connects between the Surface Control Unit and the ROV. For free swimming applications a tough, flexible, polyurethane sheathed umbilical is used. The umbilical contains power conductors to the ROV as well as control signal and video conductors. Spare conductors are provided for accessories such as sonar, survey sensors, CP probes and tools.

Launch and Recovery. The umbilical cable is designed to lift the ROV during the launch or recovery stages. It can be stored on a winch fitted with a slip ring for this purpose. However some operators save the cost of a dedicated winch and use a warping drum to take the weight of the vehicle during this process. The umbilical is coiled in a figure of eight to avoid any kinking and is then led to the warping drum from which it passes over an umbilical sheave to the ROV. When the ROV has been launched and sufficient umbilical has been deployed, the umbilical can be 'stopped' by taking a reverse turn on the warping drum.

The Umbilical Sheave can be fitted to a conveniently located ship's crane, davit or 'A' frame. In order to avoid damage to the umbilical, the sheave wheel must have a greater radius than the minimum bend radius of the umbilical.

ROV CONTROLS WITH VIDEO

ROVs range in size from that of a bread box to a small truck. Deployment and recovery operations range from simply dropping the ROV over the side of a small boat to complex deck operations involving large winches for lifting and A-frames to swing the ROV back onto the deck. Some even have “garages” that are lowered to the bottom. The cabled ROV then leaves the garage to explore, returning when the mission is completed. In most cases, however, ROV operations are simpler and safer to conduct than any type of occupied-submersible or diving operation.

Remotely Operated Vehicles (ROV)

Remotely operated underwater vehicles (ROVs) are unoccupied, highly maneuverable underwater robots operated by a person aboard a surface vessel. They are linked to the ship by a group of cables that carry electrical signals back and forth between the operator and the vehicle. Most are equipped with at least a video camera and lights. Additional equipment is commonly added to expand the vehicle’s capabilities. These may include a still camera, a manipulator or cutting arm, water samplers, and instruments that measure water clarity, light penetration, and temperature. First developed for industrial purposes, such as internal and external inspections of pipelines and the structural testing of offshore platforms, ROVs are now used for many applications, many of them scientific. They have proven extremely valuable in ocean exploration, and are also used for educational programs at aquaria and to link to scientific expeditions live via the internet.

ROV at work in an underwater oil and gas field. The ROV is operating a subsea torque tool (wrench) on a valve on the subsea structure.

Rov Instruction

A remotely operated vehicle (ROV) is a tethered underwater vehicle. They are common in deepwater industries such as offshore hydrocarbon extraction. An ROV may sometimes be called a remotely operated underwater vehicle to distinguish it from remote control vehicles operating on land or in the air. ROVs are unoccupied, highly maneuverable and operated by a person aboard a vessel. They are linked to the ship by a tether (sometimes referred to as an umbilical cable), a group of cables that carry electrical power, video and data signals back and forth between the operator and the vehicle. High power applications will often use hydraulics in addition to electrical cabling. Most ROVs are equipped with at least a video camera and lights. Additional equipment is commonly added to expand the vehicle’s capabilities. These may include sonars, magnetometers, a still camera, a manipulator or cutting arm, water samplers, and instruments that measure water clarity, light penetration and temperature.

Geometric Unsharpness in Radiography

Radiographic Testing

My Classmate Eli.