Norway, March 18 -- The application of the closed bus-ties qualifiers to DP shuttle tankers and the general technical development of DP systems has caused a need for a more detailed specification related to propellers driven by 2-stroke crosshead engines and certain switchboard configurations. This news clarifies blackout recovery requirements to the complete DP system when applying redundant DP notations with closed bus-ties qualifiers.The industry is now applying redundant Dynamic Positioning (DP) notations with closed bus-ties qualifiers (CB, CBS and/or CBT) on DP shuttle tanker designs where the main propeller is part of the DP system and driven by a 2-stroke crosshead main engine. These qualifiers introduce a requirement for blackout r...