Page 598 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

21.4 Homeland security 597
FIGURE 21.30
Size comparison between ROV systems tested.
FIGURE 21.31
Larger ROV systems function well with distant offset but are more difficult to handle than smaller systems.
21.4.9 Results of procedure testing by sizes
The power of large systems countered the lack of experience with the operators. The smaller systems took a higher degree of operator proficiency, task planning, and tether handler coordination than did the larger systems to accomplish similar tasks. The smaller systems fared better in untangling their tether and in functioning in confined spaces. The results of the tests broke down into a series of what were termed “degrees of difficulty”:
• E: Easy
• D: Difficult
• VD: Very difficult
• NR: Not recommended