Military Sealift Command has a requirement to procure evaporators in support of the USNS SOJOURNER TRUTH (T-AO 210) for the sole source material listed in the attachment. Original Equipment Manufactur... Military Sealift Command has a requirement to procure evaporators in support of the USNS SOJOURNER TRUTH (T-AO 210) for the sole source material listed in the attachment. Original Equipment Manufacture parts are required. Any offer other than the OEM parts, will not be considered.