Labels:text | font | black and white | document OCR: NSTS 17462-50 Revision H 2. Landing Site Support Requirements: (a) Primary Landing Site (PLS): (1) USML-1 middeck experiment equipment is required to be removed beginning at flight crew exit. (2) Middeck power will be provided to PCG and GBA until removal. (3) Selected experiments will be removed from the Spacelab module within 48 hours of landing. (b) Alternate Landing Site (ALS): Same as PLS. (c) Transoceanic Abort Landing (TAL): (1) Middeck experiments will be removed and returned by the SSP to KSC. (d) Emergency Landing Site (ELS): Same as TAL. 3. Flight Unique Ferry Requirements: (a) For a planned overnight stopover where the ambient air temperature is less than 50 degrees Fahrenheit, a purge shall be provided within 2 hours of landing and maintained as late as - possible prior to Shu ...