FM 17-35 ( Armored Cavalry Platoon, Troop and Squadron ) 1960

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(1) The scout section will usually lead the formation when
very little or no enemy action has been encountered and
stealth is of primary importance. Scouts may also lead
when fields of fire are short, terrain is favorable for
enemy ambush of tanks, and natural obstacles are prevalent.
Maximum use should be made of the scout section's
capability for rapid, quiet movement.
(2) The tank section will usually lead the formation, with
scouts employed on the flanks, when the platoon is approaching
a known enemy position or when it is necessary
to ensure the uninterrupted advance of the platoon.
(3) For the type of information sought in reconnaissance
mission, see paragraph 34.
b. Engineer Route Reconnaissance. When a detailed route reconnaissance
must be performed (to determine the condition of
roads and bridges, or other engineer data), engineers may accompany
the platoon. All members of the platoon must know how to
conduct an engineer route reconnaissance as explained in FM
5-36.
c. Movement During Reconnaissance. The distance between vehicles
varies with the terrain and the unit SOP. As far as possible,
visual contact between succeeding elements should be maintained.
The distance between elements must permit the platoon
to move at maximum speed and, at the same time, minimize the
possibility of involving the entire platoon in an ambush or trap,
or exposing all elements to enemy fire simultaneously. Normally,
the leading elements of the platoon (tanks and scouts) advance
by bounds from one point of observation to another. Lead elements
are covered by the elements which immediately follow, or
by elements working on the flanks. Seldom will enemy contact be
so remote that leading elements can move along the assigned route
without advancing by bounds. Key terrain features on the flanks
are normally reconnoitered by the scout section. The extent to
which lateral roads are checked is directed by the platoon leader
in conformance with the enemy situation, time available, and desired
rate of advance.
d. Action on Contact. When enemy contact is made or an obstacle
is encountered, the platoon reacts in the same manner as
described in paragraph 34.
e. Reporting. The platoon leader remains in constant radio
contact with the troop commander and keeps him fully informed
of the progress of the platoon and on information acquired.
AGO 4088B 55