TechnicalNoticeon“UnifiedInterpretationsofSOLASChapterII-2”(MSC.1-Circ.1555)IssuedbyIMO

CCSTechnical Information(2017)Technical Information No.52 Total No.300Jul.31,2017(Total 3 pages)To:relevant departments of the Headquarters of CCS,CCS'surveyors,plan approval centers,relevant ship owners,shipyards and designersTechnical Notice on "Unified Interpretations of SOLAS Chapter ll-2"(MSC.1-Circ.1555)Issued by IMO1.Preface1.The Maritime Safety Committee of the International Maritime Organization,at itsninety-seventh session,adopted "Unified Interpretations of SOLAS ChapterIl-2(MSC.1/Circ.1555)"on 21 November 2016.This circular provides more specificguidance on the definition of vehicle carrier,suitable connections for the supply ofinert gas to double-hull spaces,ventilation provided by fan coil units and internalcirculation fans,the fire integrity of the bulkheads between the wheelhouse and atoilet inside the wheelhouse,the suitable number of spare air cylinders to beprovided in connection with drills and sources of ignition on board ships carryingdangerous goods.Il.Main technical points2.1MSC.1/Circ.1555The unified interpretations of SOLAS Chapter ll-2 may apply to the followingsituations from the date of issuance of the circular(25 November 2016).(1)Clarifying the definition of vehicle carrier in SOLAS regulation ll-2/3.56and ll-220-1.It makes clear thatthat vehicle carrier is intended for pure car andtruck carriers,and should exclude other types of ro-ro cargo ships or