a. The transportation railway service (TRS) of the theater army support command (TASCOM) consists of units required to supervise, operate, and maintain the existing railway net. Railway units are no longer organic battalions but are organized on the building block principle, which permits assignment to a theater of only those units required to operate and maintain the rail- way net. b. Since all supervisory and subordinate rail- way units in a theater are assigned to the sen- ior transportation organization (normally a trans- portation command), they operate under the com- mand and supervision of that headquarters. Subordinate transportation railway units are at- tached further to a railway unit at the appropri- ate level of command for operation and control. c.
DesignationFM 55-20
EditionJun 1974
StatusSuperseded
Pages170
FunctionSustainment
CollectionHistoric
Public domain (U.S. Government work)