99
surfaces were subject to Lepas fouling. As expected fouling was most severe in
semi-protected low-turbulence parts of the vehicle which led, at one point, to loss of
directional control due to fouling of the rudder hinge.
4.5 Mechanical Abrasion of Ocean Observing Platform
Components
High energy environments can cause abrasion of anchoring and electrical systems.
Chain link abrasion due to wave and current action, added to rapid oxidation of the
recently exposed metal, can cause catastrophic failure of buoy anchor systems
resulting in loss of the anchoring system thus setting the buoy adrift, a significant
safety concern. Best practice is consequently the periodic replacement of the entire
anchor chain used for coastal buoys.
Strong wind, current, and wave action can cause strumming (rapid vibration) of
electrical wiring that can lead to component failure. As practiced in naval, aeronautical, and automotive engineering, electrical wires are bunched together in wiring
harnesses wrapped in protective tape or plastic coverings. Additional chafing gear
such as flexible tubing or helical sheaths may be added at critical contact sites
between metal and the wiring harness, especially if in contact with metal edges.
Wiring harnesses such as those leading from submerged or tower-mounted instruments to the buoy instrument bay are firmly secured using nylon cable ties throughout the cable run.
Shore-crossing power and communications cable are in these days generally tunneled underground using directional boring, in large part due to environmental
restrictions, but in good measure due to the possibility of cable failure resulting
from abrasion caused by high energy breaking waves, especially along rocky shores
(Pierce and Romanelli 1969).
References
Bahador A. Cathodic corrosion protection systems: a guide for oil and gas industries. NY: Elsevier;
2014. ISBN: 9780128003794. 492 p.
Brown BF. Corrosion. In: Myers JJ, Holm CH, McAllister RF, editors. Handbook of ocean and
underwater engineering. Section 7: Materials and testing marine corrosion, boring and biofouling. New York: McGraw Hill; 1969. pp. 3-4 to 3-30.
Delauney L, Compere C, Lehaitre M. Biofouling protection for marine environmental sensors. Ocean Sci. 2010;6:503–11. https://doi.org/10.5194/os-6-503-2010. www.ocean-sci.
net/6/503/2010/. Accessed 15 Sept 2017.
Dewan A, Ay SU, Nazmul Karim M, Beyenal H. Alternative power sources for remote sensors: a
review. J Power Sources. 2014;245(2014):129–43.
Di Donato P, Poli A, Taurisano V, Abbamondi GR, Nicolaus B, Tommonaro G. Recent advances
in the study of marine microbial biofilm: from the involvement of quorum sensing in its production up to biotechnological application of the polysaccharide fractions. J Mar Sci Eng.
2016;34:14. https://doi.org/10.3390/jmse4020034.
References
surfaces were subject to Lepas fouling. As expected fouling was most severe in
semi-protected low-turbulence parts of the vehicle which led, at one point, to loss of
directional control due to fouling of the rudder hinge.
4.5 Mechanical Abrasion of Ocean Observing Platform
Components
High energy environments can cause abrasion of anchoring and electrical systems.
Chain link abrasion due to wave and current action, added to rapid oxidation of the
recently exposed metal, can cause catastrophic failure of buoy anchor systems
resulting in loss of the anchoring system thus setting the buoy adrift, a significant
safety concern. Best practice is consequently the periodic replacement of the entire
anchor chain used for coastal buoys.
Strong wind, current, and wave action can cause strumming (rapid vibration) of
electrical wiring that can lead to component failure. As practiced in naval, aeronautical, and automotive engineering, electrical wires are bunched together in wiring
harnesses wrapped in protective tape or plastic coverings. Additional chafing gear
such as flexible tubing or helical sheaths may be added at critical contact sites
between metal and the wiring harness, especially if in contact with metal edges.
Wiring harnesses such as those leading from submerged or tower-mounted instruments to the buoy instrument bay are firmly secured using nylon cable ties throughout the cable run.
Shore-crossing power and communications cable are in these days generally tunneled underground using directional boring, in large part due to environmental
restrictions, but in good measure due to the possibility of cable failure resulting
from abrasion caused by high energy breaking waves, especially along rocky shores
(Pierce and Romanelli 1969).
References
Bahador A. Cathodic corrosion protection systems: a guide for oil and gas industries. NY: Elsevier;
2014. ISBN: 9780128003794. 492 p.
Brown BF. Corrosion. In: Myers JJ, Holm CH, McAllister RF, editors. Handbook of ocean and
underwater engineering. Section 7: Materials and testing marine corrosion, boring and biofouling. New York: McGraw Hill; 1969. pp. 3-4 to 3-30.
Delauney L, Compere C, Lehaitre M. Biofouling protection for marine environmental sensors. Ocean Sci. 2010;6:503–11. https://doi.org/10.5194/os-6-503-2010. www.ocean-sci.
net/6/503/2010/. Accessed 15 Sept 2017.
Dewan A, Ay SU, Nazmul Karim M, Beyenal H. Alternative power sources for remote sensors: a
review. J Power Sources. 2014;245(2014):129–43.
Di Donato P, Poli A, Taurisano V, Abbamondi GR, Nicolaus B, Tommonaro G. Recent advances
in the study of marine microbial biofilm: from the involvement of quorum sensing in its production up to biotechnological application of the polysaccharide fractions. J Mar Sci Eng.
2016;34:14. https://doi.org/10.3390/jmse4020034.
References