1963 US Army Vietnam War Armor Operations ... - Survival Books

WWW.SURVIVALEBOOKS.COMe. Bank Conditions. Banks can often be im-:MPliH |proved a i by use of pioneer tools or dozers. Cor-: t- duroying (laying logs) can improve entrancesFPS KNOTSinto the water.f. Determining Landing Point on Far Bank.: _ = a=< The S bow -(1) of the armored personnel carrieris always pointed directly acrossthe stream, perpendicular to the rivercurrent. The driver must not buckthe current. The only time this ruledoes not hold true is when the speedof the carrier, in water, is twice thespeed of the current. Then, the bowof the carrier may be pointed into thecurrent, at an angle of not more than.~--- ~' 0 __i 30 ° in the direction of the flow. Whenthe speed of the current and the speedof the carrier are the same, the carrierdrifts 1 foot downstream for each.- i - ---- .foot yit moves forward. When thespeed of the current is twice that ofthe carrier, the carrier moves 2 feetdownstream for each foot it movesGili;- | ~forward.(2) A simple formula for determining thepoint of landing on the far bank is-STREAM VELOCITY (M.P.H.)SPEED OF CARRIER (M.P.H.)DISTANCE ACROSS THE STREAMIN FEET -DISTANCE OF DOWNSTREAM2 ' _ DRIFT Xi IN FEET·. " -, 3 0 - |For.100example, a carrier traveling at 4miles per hour in a stream that has avelocity of 4 miles per hour and isfeet across will land 100 feetFigure 28. Chart for converting feet per second tomiles per hour.__!fuS -- '20-1_0203, IQ3_