<>VS10Standard Ventilation - Substitute Carrier's Protective Service at First Terminal Train Yard where Heaters Are Available and Outside Temperature is 10 Degrees Above Zero or Lower (PPT #619 Rules 385 and 515)
<>VDOIDiagonal Vents on Irons
<>V40Standard Ventilation at "--" Degrees (Other than 32 Degrees)
<>VSStandard Ventilation at 32 Degrees
<>VCVents Closed to Destination
<>VOIVents on Irons
<>VD40Diagonal Ventilation at "--" Degrees (Other than 32 Degrees) - Open Vent Each End of Car
