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

WWW.SURVIVALEBOOKS.COM+10 percent100 FT. HORIZONTALDISTANCEFigitre 29. Expression of percent slope._l' (FAR BANK)l,..DOWN SToREAM DRIFTEXITDIRECTION 1 o SOF CURRENTSPEED OF CURRENT £(4 MPH)ENTRANCE ,(NEAR BANK)(BOW OF APC HEADED STRAIGHT ACROSS STREAM)Figuore 30. Downstream drift in a stream crossing.176number of entrances and exits, andtion insures that upstream vehicles dothe number of armored personnel car-not drift into downstream vehicles.riers to cross. For example, if the (2) If the mission is ferrying, the greatestmission requires a mechanized infan-danger is collision. A collision maytry unit to cross in one move, andoccur in 1 of 2 situations-the meetthereare enough entrances and exits,ing situation and the passing situathebest formation is an echelon-tion.echelon left is the stream flows left to (3) When two carriers approach eachright, echelon right if the stream flowsother head on, each should turn to theright to left. The carrier farthest right and pass the other vehicle ondownstream moves out first, followed its left side. The turn should beby the one next farthest downstream,started soon enough for each driverand so on; the carrier farthest up-to be sure of what the other intendsstream moves out last. This forma-to do.~~~~~~~~~~~~~~~~~~176 ~~~~AGO9139A