Page 252 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition
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FIGURE 9.25
Ship door LARS.
9.3 Currents and tether management 241
(Courtesy Cargotec.)
FIGURE 9.26
Offshore platform LARS.
Flyer. ROV Doc Ricketts can dive to about 13,000 ft (4000 m) below the ocean surface. Other heavy-duty LARS techniques are shown in Figures 9.24 through 9.26. Regardless of the LARS approach, the worst case dynamics and adequate safety factors must be taken into consideration because eventually these conditions will probably be encountered.
9.3 Currents and tether management
Once the vehicle is through the splash zone, tether management becomes critical to the success of the mission. This is especially important for the smaller, lower thrust, observation-class ROVs. Although the more powerful work-class vehicles can encounter many of the same problems, a sin- gle problem with tether management and the mission could be a failure and/or the ROV could be lost. The critical considerations of tether management follow.
(Courtesy Forun Energy Technologies.)
