(4) Incoming trucks should be kept to the minimum essential for the efficient operation of the
post, and escorts should be provided if vehicles are allowed access to restricted areas.
(5) Sometimes trucks carry loads that are impractical to examine. If so, door seals may be used
by security personnel at the entrance gate. These seals will be opened by a security guard or
designated representative at the receiving end. Likewise, the truck doors may be resealed for exit or
other stops within the post.
(6) Loading and unloading operations should be strictly supervised by security personnel. This
will assure that unauthorized materiel or persons do not enter or leave via trucks or other vehicles.
Trash details working in restricted areas should be supervised by security personnel.
g. Railroad Car Control.
(1) The movement of railroad cars into and out of posts should be supervised, and the cars
should be inspected. This will prevent the entry or removal of unauthorized personnel or materiel.
Inspecting personnel should be very watchful for explosives and incendiaries.
(2) All railroad entrances in isolated areas should be controlled by locked gates when not in
use. They should be under security personnel supervision when either unlocked or opened for
passage of railroad cars.
(3) Railroad switching should be confined to daylight hours. Such is the case if this does not
materially interfere with efficient operation of the post or facility.
(4) The numbers of the seals of all sealed railroad cars should be checked. This should occur
immediately upon arrival at the post. Numbers should be checked against the list of seal numbers.
This list should be requested from the shipper. Broken seals or seal numbers not in accordance with
the list from the shipper warrant immediate investigation.
h. Maritime Control. Docks, piers, and quays should be separated from the main post by a fence
and controlled gates. Passage to and from the area must be limited to authorized personnel.
Sometimes the inspection of a vessel is necessary. This will prevent entry of unauthorized persons,
cargos, or sabotage devices. Such inspections should be done by persons experienced in the
intricacies of maritime construction. Aid may be sought from the Army Transportation Corps or
Engineer Corps. Also, the US Coast Guard will aid in this inspection.