Page 616 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

616 CHAPTER 22 It’s the Little Things That Matter
(Continued)
Vehicle Size
Task SML
a. Run bilge keel or keel
b. Inspect running gear to stuffing block
c. Inspect sea chest(s)
d. Inspect thrusters
e. Inspect through-hull fittings
f. Inspect bulkhead/pilings
g. Run anchor chain
h. Acoustically/visually search bottom under vessel
Tied off to different structure and swimming to object (100-ft/30-m offset)
X D P P P P P P P P P P P P P D P P D P P P P P
Note: In some instances it may be necessary to tie off to a different structure from the vessel to be inspected with some distance offset. This method of operation complicates the inspection task and may be impossible with some smaller systems. Consider moving the deployment platform closer, handling the tether from the vessel, or delaying the task until logistical conditions improve.
a. Run bilge keel or keel
b. Inspect running gear to stuffing block
c. Inspect sea chest(s)
d. Inspect thrusters
e. Inspect through-hull fittings
f. Inspect bulkhead/pilings
g. Run anchor chain
h. Acoustically/visually search bottom under vessel
X D P X D P X D P X D P X D P X D P X X D X D P
Visual and Acoustic Hull Inspections from Vessel
Deployed from vessel with RB handling tether
Note: In some instances (such as with an overhanging bow or stern structure), mechanical advantage may be gained while operating the ROV system from the vessel to be inspected by having the tether tended from the RB.
a. Run bilge keel or keel
b. Inspect running gear to stuffing block
c. Inspect sea chest(s)
d. Inspect thrusters
e. Inspect through-hull fittings
Deployed from RB with tether handled from vessel
X D P P P P P P P P P P P P P
Note: As stated above, in some cases it may be beneficial to separate the deployment platform from the location of the tether handler. If this is deemed advisable, either swim the vehicle to the inspection platform for retrieval of the tether or physically walk the vehicle to the vessel to be inspected. Then deploy the submersible over the side and commence the inspection.
a. Run bilge keel or keel
b. Inspect running gear to stuffing block
X D P P P P
(Continued )