Page 533 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

530 CHAPTER 19 Manipulators
FIGURE 19.27
Tooling deployment unit with dual docking probes.
(Courtesy Forum Energy Technologies.)
FIGURE 19.28
Tooling deployment unit with single and dual docking probes.
the corresponding receptacle on the interface side. The TDU is most useful when the intervention item is a standardized control panel.
19.7.4 Remotely operated tooling (dual downline intervention)
As detailed in the standard, the remotely operated tooling (ROT), and/or a dual downline component change out (CCO) item, is typically used to deploy or change out subsea components that exceed the payload capacity of the vehicle. An example of a CCO would be a pipeline end termination (PLET), wellhead or other item requiring retrieval and/or setting on the seafloor. However (as depicted in Figure 19.29), when performing construction or decommissioning tasks, the ROT (separate from the