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

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(2) In the development of the situation, mounted and dismounted
patrolling and reconnaissance by fire are undertaken
immediately to determine the location, strength,
composition, and disposition of the enemy.
e. Action at an Obstacle.
(1) When an obstacle is encountered during the route reconnaissance,
its location and description are reported. The
platoon takes the necessary action to reduce the obstacle
if such action is within its capabilities and does not interfere
with the accomplishment of the mission.
(2) When the obstacle cannot be readily reduced, the platoon
bypasses the obstacle, reports the bypass, and, if appropriate,
recommends to higher headquarters the action
necessary to eliminate the obstacle.
(3) When the resistance encountered will interfere with the
assigned mission, the platoon leader reports accordingly
and attempts to bypass to continue his mission. When a
bypass is found, it is reported to the higher unit commander
and the platoon continues on its original mission
unless otherwise directed.
35. Zone Reconnaissance
a. General. In a zone reconnaissance, the scout platoon operates
generally in the same manner as in a route reconaissance. The
formation adopted will depend on the width of zone, terrain, vegetation,
enemy situation, time allocated to complete the mission,
and thoroughness of effort desired. In a zone reconnaissance, elements
of the platoon should move over routes that afford the fastest
and most complete coverage of the zone.
b. Conduct. In conducting a zone reconnaissance, the scout platoon
normally uses a line formation. If only two sections are required
abreast, the third section may be employed to protect an
exposed flank, to be a reserve, or to reconnoiter terrain features
that will expedite the conduct of the zone reconnaissance. Each
squad must make maximum use of observation points along its
route to rapidly cover the entire zone.
c. Action on Contact. See paragraph 34.
36. Area Reconnaissance
a. General. In an area reconnaissance, the scout platoon moves
directly to the area to be reconnoitered. Any enemy opposition encountered
en route to the area should be reported and bypassed.
When the platoon has arrived at the designated area, it may per-
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