authorizing movement from A to H.
The last train would carry an order
stating that it was the last of the westbound movements. When this train
reaches H, the order would be the authority for the yard there to start
moving empties back to A. When the last eastward train arrives at A, the
order that it carries then authorizes westward movement to begin again.
Thus, trains may go in one direction for a period of several hours to
several days, before movement starts in the opposite direction. This system
can also be used by specifying certain inclusive hours or days for westward
movements and an equal period for returning empties eastward. These may be
established in 4-, 8-, 12-, or 24-hour periods as required. How long each
direction is used continuously depends entirely on the capacities of the
yards, railheads, and terminals at the forward points.
In addition to transmitting train orders, the dispatcher's telephone
circuit is used for furnishing information to and answering questions for
employees along the line.
Because of the importance of copying and
repeating train orders correctly, the dispatcher usually does not permit
interruption of their transmittal. However, it may be justified to make a
report which might cause the dispatcher to change the order being dictated
or to prevent a wreck or serious delay to trains.
Transmitting train orders is the first order of business over the
The priority of other calls must be established when several
persons are waiting to speak to the dispatcher. Usually, calls in the first
category are those dealing with main-track operations; in the second, those
requesting information related to but not directly affecting main-track
operations; and in the third, those that are ordinarily unimportant from the
dispatcher's point of view but important to the person making the call.
In the early stages of theater operations, the transportation railway
service may request radio facilities.
If approved, signal units install,
maintain, and operate the equipment.
Basic rules of radio procedure are
prowords--are used and understood in TRS radio transmission.
consists of a heading, a text, and an ending.