Ventilation and Venting | Midpage32.55-1Ventilation of tank vessels constructed on or after July 1, 1951—TB/ALL.32.55-5Ventilation of tank vessels constructed between November 10, 1936, and July 1, 1951—TB/ALL.32.55-10Ventilation of tank vessels contracted prior to November 10, 1936—TB/ALL.32.55-15Ventilation for hold spaces—TB/ALL.32.55-20Venting of cargo tanks of tankships constructed on or after July 1, 1951—T/ALL.32.55-25Venting of cargo tanks of tank barges constructed on or after July 1, 1951—B/ALL.32.55-30Venting of cargo tanks of tank vessels constructed between November 10, 1936, and July 1, 1951—TB/ALL.32.55-35Venting of cargo tanks on tank vessels constructed prior to November 10, 1936—TB/ALL.32.55-45Venting of cofferdams and void spaces of tank vessels constructed on or after November 10, 1936—TB/ALL.32.55-50Ventilation of tankships that have a keel laying date on or after January 1, 1975—T/ALL.