Page 617 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

22.1 Standard operating procedures 617
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Vehicle Size Task SML
c. Inspect sea chest(s)
d. Inspect thrusters
e. Inspect through-hull fittings
P P P P P P P P P
Visual and Acoustic Hull Inspections from Dock
Deployed from dock with RB handling tether
Note: In some instances (such as the inspection of the seaward side of a moored vessel), some mechanical advantage may be gained by tending the tether 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 dock
X D P P P P P P P P P P P P P
Note: In some instances (such as the inspection of the shore side of a moored vessel), some mechanical advantage may be gained by tending the tether from the dock.
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
Stationary deployment from RB
X D P P P P P P P P P P P P P
Note: For some smaller moored vessels, some advantage may be gained by attempting to swim the entire hull from a single point. However, this method is, in most cases, inefficient.
a. Sub swimming entire ship from single spot—bow
b. Sub swimming entire ship from single spot—amidships
c. Sub swimming entire ship from single spot—stern
Minimal tether in water from RB
X D P D P P X D P
Note: This method requires coordination and practice, but in most instances it is the most efficient.
a. Station-keeping with RB moving along with sub X D P
b. Move RB from stationary point to point and deploy D P P
Longitudinal/lateral searches from RB
Note: Longitudinal inspections are more time-efficient than are lateral searches since it requires much less effort to reposition for each search line. However, lateral searches allow for better control of the tether due to less wetted surface on each search line. These two considerations must be balanced based upon the conditions prevalent at the time of the tasking.
a. Longitudinal search from bow X D D
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