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risk related to unexpected automated responses to fault conditions that are not identied by the standard FMEA testing. System improvements have been made as a result of this. Remote dial-in diagnostics for critical control systems are installed to enable troubleshooting by onshore-based specialists. e compressed air for the seismic source is pro- vided by three compressors, each having an output of 2,190 standard cubic feet per minute and with delivery pressure up to 3,000 psi. ese are electrically-driven, variable-speed units, which help reduce emissions as only the required amount of air needed for the source is compressed. Sensors and the automat ion system control the speed of the compressors to maintain pressure and ow at an optimal level. ere are ve additional boats onboard: two life- boats with capacity for the complete crew within each boat, a high-specication 7.5 m fast rescue craft, and two 9.6 m seismic workboats. e seismic boats have a top speed of 25 knots, and can carry two sections of seismic streamer with a mass of approximately 840 kg. ey also have twin engines and additional special tools built into the design to facilitate in-sea replacement of damaged sections within the streamers. e seismic workboats are recovered into a side recess that provides protection for the crew when performing maintenance in adverse weather conditions. e davit system uses a passive shock absorber to reduce dynamic forces from snatch loading during handling. DNV recently announced the introduction of a new notation, SEISMIC, that is intended to establish stan- dards for various systems and arrangements onboard including oshore refuelling. ese C-class vessels have been designed in such a way as to take into account high- est industry standards and best practices in anticipation of obtaining this notation retrospectively. Oshore construction vessel Fugro Symphony is a lengthened near sister? vessel of the Saltire , which was delivered in 2006. Fugro Symphony was extended by 20 m to give the vessel a signicant amount of additional deck space. e arrangement below the main deck was changed to allow the main deck to not have any fuel tanks directly under- neath, which facilitates faster project mobilizations as tank cleaning and gas freeing is not needed prior to carrying out hot work on deck. It is possible to walk around below deck and see the entire underside of the main deck, which signif- icantly reduces re risk. is arrangement is also a benet when additional below deck stiening is required to support equipment that exceeds the 10 ton/m 2 design limit. www.sname.org/sname/mt January 2013 Geo Coral has ?ve additional boats onboard: two lifeboats with capacity for the complete crew within each boat, a high-speci?cation 7.5 m fast rescue craft, and two 9.6 m seismic workboats.