manual for commanders of infantry platoons. - US Army Combined ...

180 P~Wb1UAI~ FORs OO~M~AWDi~ R8 OF IC~iFAPJTTUY~ FPLATb~i~OOJS
In the scale 1/80000, 1. millimeter represents 80 meters; 1
kcilometer is represented by 1_27mfllimeters. The diameter of
a 5-cen-time piece measures (to thfis scale) exactly 2. kilomneters,
The sheets of the map are 40 krilomleters by 0i4 kilomxeters;
qunarter sheets are 10 by 32 kiilometers,
T~he sidies of the cadre ar·e dlivided exteriorl~* into dlegrees
and interiorly into grades.. The ccatigrades of the vertical
sides-that is t-osa~y, the mneridians--are invariably 1_ kilometer
a2parlt. Do not confuse w~tithl Jthe ceatigra~des of latitude
(horizontal sides of thbe cadre), wrhich vary in length according`
to their dista2nce fromi the poule.
Fiinally, for rapid estimates one should be able to estimate a
kilometer by means of the wiidth of the ~finger,, the length of' a
finger nail, etc., conveniently standardized.
CONVENTIQNAL SIGN'S EMrPLOYE~D OBLIGATOETLY O)N Mi]APS orfi SCALE;3
OF 1~/eooo AND1 LALGER.
(Sketches, reports; etc.)
]Projected trenches or approaches.
The same, commenced and partially serviceable.
Tchesame, finished and Occupleei.
The salme,~ dleterior~at~ed and become unserviceable (partiarl
erasure of preceding conventional sign). Treiiches in red or
blackinkl. Appr~oaches in green or blackr pencil.
Subte~rranean commr~unication.
Elevated trench, wvithz gabions.
Compul ory dir~ection of movement.,
Small post; barricade or defensive travserse.
Fodotlbridge. Step~s.
Wir~e entanglement;, attalched to post~s.
Brun entanglemrent. (XWire in collapsible spirals.l)
Oth'er accessory defenses.
Command post of a battalion comm~ander (or· colonel or general).
Command post of a company.
Telephone. station.
Telephone line.
Visual signal station.
Relay lof r1unnlers.