Transcription
MHICopy 2FM 21-30WAR DEPARTMENTBASIC FIELD MANUALCONVENTIONAL SIGNS, MILITARYSYMBOLS, AND ABBREVIATIONSvj1
FM 21-30BASIC FIELD MANUALCONVENTIONAL SIGNS,MILITARY SYMBOLS, ANDABBREVIATIONSPrepared under direction of theChief of EngineersUNITED STATESGOVERNMENT PRINTING OFFICEWASHINGTON : 1941For Mle by the Superintendent of Documents. Washington, D. C.
WAR DEPARTMENT,WASHINGTON, November 26, 1941.PM 21-30, Basic Field Manual, Conventional Signs, MilitarySymbols, and Abbreviations, is published for the informationand guidance of all concerned.[A. G. 062.11 (7-7-41).]BY ORDER OF THE SECRETARY OP WAR:G. C. MARSHALL,Chief of Staff.OFFICIAL :E. S. ADAMS,Major General,The Adjutant General.DISTRIBUTION:B and H (5); R (10); Bn (5), 1 (10); C (10).(For explanation of symbols see FM 21-6.)
TABLE OP CONTENTSSECTION I. General.ParagraphPagePurpose.—. .———————.11Scope. — — ------ ——— ——— — .21II. General topographic symbols.Characteristics ————-.-———.31List42III. Symbols for air navigation maps.Characteristics —————-.——518List618IV. Military symbols.General rules.——————. —— -720List of basic symbols—————— — ——822Application of special symbols.- 933V. General abbreviations.General use. ———. — —.1044Use with hydrographic symbols. —1145VI. Military abbreviations.List1247Examples——.—----- — ————1361APPENDIX. List of references ——----- .64INDEX . ————— — — — —————————— . — .——65nx
FM 21-50BASIC FIELD MANUALCONVENTIONAL SIGNS. MILITARY SYMBOLS, ANDABBREVIATIONSThis manual supersedes FM 21-30, August 1, 1939, and TrainingCircular No. 48, War Department, 1941.SECTION IGENERAL 1. PURPOSE.—This manual is intended to supply the information required by the map reader. Persons engaged inthe preparation of maps should be guided by AB 300-15,TM 5-230, and by Bulletin 788, Topographical Instructionsof the United States Geological Survey. 2. SCOPE.—This manual shows in convenient form theabbreviations and general symbols which have been authorized for military use. The general topographical symbols insection II, the symbols intended for air navigation mapsonly in section III, and the general abbreviations in sectionV have been approved by the Federal Board of Maps andSurveys and are prescribed for use on all United States maps.Symbols of a purely military nature prescribed by the WarDepartment are given in section IV and special abbreviationsauthorized for military use, in section VI. Symbols otherthan those herein authorized may be used, provided they donot conflict with any authorized symbols and are explainedin a suitable legend on the map.SECTION IIGENERAL TOPOGRAPHIC SYMBOLS 3. CHARACTERISTICS.—a. Size.—In general, symbols resemblethe objects which they represent. The symbols vary in sizewith the scale of the map. On small-scale maps, symbolsare reduced to their most elementary form and do not conform to scale. As the scale is increased, the symbols assumethe shape and scaled size of the object represented.b. Color.—The symbols are shown in appropriate color fora four-color map. When less than four colors are used, thesymbols shown in paragraph 4 in the colors not used willbe executed in black ink.1
3-4CORPS OF ENGINEERSc. Lettering.—VERTICAL ROMAN type indicates civil divisions, SLANT ROMAN type (or italic) indicates naturalwater features, VERTICAL GOTHIC type indicates naturalland features, and SLANT GOTHIC type indicates worksof man. Lettering, either mechanical or freehand on military maps hastily prepared, may vary considerably fromthese types. Likewise, marginal data as indicated in paragraph 4c will not be nearly as complete on military sketches. 4. LIST.—a. Works and structures.Canal, ditch, or open aqueduct-.———— JCanal, �—Buried aqueduct or water pipe.Aqueduct or canal in tunnelCanal lock (point upstream) . -- --- — -LCanal lock (large scale)Good motor Poor motor or private On small-scale maps ————Routes usually traveled are further classified by redoverprinting as follows:Hard impervious surfaces.orRoads other surface improvements— .orU. S. RouteState Route(Date of road information shown in margin ontactical maps.)
SIGNS, SYMBOLS, AND ABBREVIATIONS4Good pack trail .Poor pack trail or footpath .Railroad of any kind, small-scaledmaps.— ——— — IRailroad single track, large-scale ( H ''''''''' *"maps———— ————————JDouble track ———— —— . i i i i i i i i i i i iRailroads Juxtaposition of i.i.i.i.i.i.iiv.i.i.nvNarrow gage — —— . . Abandoned . - --.——— - i-n-t -tElectric, passenger only .In road or street ?','-?,?«9Railroad, crossing ———(grade—RR above—RR beneath)Tunnel (railroad or road) ————————— , , , , .( , , , ,Railroad station of any kind — . , , , , , , m , , , , , ,On ground or poles--T TTTTTTTTTelegraph and telephone lines' Underground—.-.T T T T T , T T TSubmarine-—————.Electric power transmission line—————. .—.———.—.
CORPS OF ENGINEERS4General symbol.Capacity in tons indicated by figures. —————————————M-fl-Arrow denotes direction of flow --——-—-] JDrawbridges (on large-scale]charts leave channel open)]Bridges Truss (W, wood; S, steel;G, girder; C, concrete)Foot.Suspension.Arch. * *Ponton.Ferries.General symbol (for vehicles) .Fords EquestrianPedestrian .Dam—— —-Dam with lock- —— .Breakwater and jetty.Levee (standard symbol).f r-»-
SIGNS, SYMBOLS, AND ABBREVIATIONSLevee (optional for War Department). ::H n:tiRevetment (optional for War Department)Retards and dikes —River gage —————Wharves and docksBuildings in general .,Ruins.Cliff dwellings.ChurchChurch (optional symbol for nautical charts) ——————— *Hospital ———OSchoolhouse — f «-«»„Temple, pagoda—— —— ———— x «*Windmill . ——— «Port X. Sample combination showing city, town,or village- —- .419767
4CORPS OF ENGINEERSCity, town, or village (generalized) —Capital . @City, town, or village (small-scale maps). County seat———- Other towns0Cemetery— — ——. [f fj or. it]Mine or quarry of any kind (or open cut).*Prospect— . „ -- .xShaft B[Opening———— — ———— —— — AMine tunnel j[Showing direction.- —— — — — Oil or gas wellsOooo 0Tanks-.,.—.„. „„ . .„„ .„„ . . ;;.Coke ovens/ Pence of any kind (or board fence)Stone. . .Fences Worm .Wire———————————— .——.Hedge . .
SIGNS, SYMBOLS, AND ABBREVIATIONSb. Boundaries, marks, and monuments.National, State, or Province line———County line.——— ———————————. ——Civil township, district, precinct, or barrio.Reservation line ———— — . ——Land-grant line— ———————————. — City, village, or borough———————— . ——*Cemetery, small park, etc—————————.U. S. township, section, and quarter- (section lines (any one for township]line alone, any two for township and]----section lines)\Located U. S. township and section corners. {.iBoundary monument —————— . B ———Triangulation point or primary traverse station ————— APermanent bench mark (and elevation) ——— BXM1232Precise bench mark ——————— —— ——— P JJ M1232Intermediate bench mark (and elevation)————— ——— x 1232U. S. mineral monument——— —AObservation spot (astronomic position)«Any located station or object (with explanatory note) ——oc. Marginal information.—Where practicable the followingdata are shown in the margins of all maps, photomaps, oraerial photographs, and usually in the places indicated bythe encircled figures. On military maps, overlays, and field7
CORPS OF ENGINEERSsketches only the essentials of character, orientation, time,source,, and scale are shown, and then not necessarily in themargins. For detailed information on aerial photographssee FM 30-21. y/2.3.5.6.7.8.9.10.11.12.13.UV.15.Descriptive title, name, and location.file or index number.Representative fraction and/or graphic scale.Meridian and grid orientation.Particular legend.Contour interval.Maker and source of material.Projection used.Horizontal datum.Vertical datun.Control used.Zones of military grid.Designations of geographic grid.Designations of nUitary "grid.Names and index of adjoining sheets. ? , @d. Drainage.Streams in generalIntermittent streamsProbable drainage, unsurveyedLake or pond in general(with or without tint, waterlining, etc.)Salt pond (broken shore line if intermittent)Intermittent lake or pond . H §
SIOHS, SYMBOLS, AND ABBREVIATIONSSpringWells and water tanksPalls and rapidsContours (or as below).GlaciersForm lines showing flow.e. Relief (shown by contours, form lines, hachures, or shading as desired).vContours (blue if under water).Contours (approximate only).Form lines (no definite interval).Hachures.
CORPS OF ENGINEERS4Depression contours. ———————————CutsPills .Mine dump (ore).Tailings———— .Rocky (or use contours).Bluffs,Other than rocky (or use contours)Sand and sand dunes For planimetric maps:Ridge lineRim rock or escarpment——.————. ;/m lfWashes———— . /. Land, classification.Overflowed land- 10
SIGNS, SYMBOLS, AND ABBREVIATIONSMarsh in general (interior salt marshesand coastal fresh marshes are to be indicated as such).Cypress swamp. ———' .Woodland (or as shown below) .Woodland (or broadleaved trees).Dense woods or jungle growth-Pine (or narrowleaved trees)PalmPalmetto ——— .Mangrove ———————-.11
CORPS OF KNGINRRSBamboo.C?.CtUS-Banana.Orchard-Grassland in general.Tall tropical grass-Cultivated fields in general-Cotton.i.j, -U-UJ. J; 1tU.i a-U.i-Rice.- J . I ) \ i ;12
SIGNS, SYMBOLS, AND ABBREVIATIONSSugar caneCorns'. Hydrography, dangers, and obstructions.( nsurveyed .In general-LandRocky ledges——Shores (high and lowwater lines and areasbetween)Coral reefsLand -. .Gravel and rocks419767 -13Land
CORPS OF ENGINEERSMudShores (highland lowwater lines and areas between)—Con.Tidal flats.Kelp or eel grass————————.Ice limits (ice packs or barriers)Bock under water.————— ———————————————— Rock awash (at any stage of the tide)——————————— *Breakers along shore.—— ————.--— \CL- - —Fishing stakes. m.!.,.;.-.Fish ————————— .- """ LiOverfalls and tide rips—— „—————— SS' JL JS—Limiting danger line.——Whirlpools and �— (jjj\(g)Wreck (any portion of the hull or superstructure abovelow water) ————— ———— —————- « Sunken wreck (dangerous to surface navigation)— ; g?14
SIGNS, SYMBOLS, AND ABBREVIATIONSSunken wreck (not dangerous to surface navigation northose over which the depth exceeds 10 fathoms)Submarine cableCurrent, not tidal, velocity 2 knotsSpecial usage)— ———'Flood, iy knots—Tidal currentsEbb, 1 knot.———Flood, second hourEbb, third hour —No bottom at 50 fathoms ——— foDepth curves:1-fath'om or 6-foot line .2-fathom or 12-foot line—- .3-fathom or 18-foot line .4-fathom line—— ——— —.5-fathom line — .6-fathom line. . —10-fathom line—— ———— ———20-fathom line —.30-fathom line. .40-fathom line .50-fathom line. „100-fathom line .«,/t&m:»,i:« u,. «/» «» /a . , *,,,,.,.,/. . . .- — —— —— — . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - ——————— --h. Aids to navigation, etc.Life-saving station (in general).- —— — L.S.SLife-saving station (Coast Guard) -. c.a. IBS15
CORPS OF ENGINEERSLighthouse————— --.——————————— ——— ————— Lighthouse on small-scale (light sectors shown by dotted lines)Light vessels showing number of mast lights—————— 4* 4tRadio station R -S-QRadio direction-finder station (radio compass station) — RQ.ORadio tower . . .— . R.T.ORadio beacon . . R.Bn.OWater gage-,.— .————— — —— —— —-o-Lighted . *Beacons (sectors shown bydotted lines)Not lighted (sample of . 11111distinctive top marks)Buoy of any kind (or red buoy) ——. —— —— . ?Black . . . fStriped horizontally (in general) 0Striped horizontally (red and black)— . Striped vertically Checkered. ———— . Buoys,Perch and square.—Perch and ball— - . .Whistling (or use first six symbols with , .JST S**,,word "whistling") ? .-o» »»», » /.Bell (or use first six symbols with word "bell") . . .Lighted .16
SIGNS, SYMBOLS, AND ABBREVIATIONS(Of any kind (or for large vessel). Anchorage [ For small vesselsMooring- -- .Range or bearing line.Track lineDrydockFloating drydock .Patent slip .Leader cable. . 17
CORPS OF ENGINEERS5-6SECTION IIISYMBOLS FOR AIR NAVIGATION MAPS 5. CHARACTERISTICS.—The conventional signs for use on airnavigation maps differ from those used on topographic mapsas follows:a. The features on the ground which are easily discerniblefrom high altitudes are the ones which are emphasized on theair navigation map and the other features are subordinated orentirely omitted. In this way the aviator is provided with amap showing landmarks visible from the air, permitting himto direct his flight by these landmarks.b. All symbols adopted are larger and more striking to theeye so that the aviator may easily read his map under difficultconditions.(Symbols usually reproduced in Red)B 6. LIST.Army, Navy, or Marine Corps fieldCommercial or municipal fieldDepartment of Commerce intermediate field.Marked auxiliary field—j—Airplane landing field, marked or emergency ———— ».'(where not shown in plan nor by symbol indicatingcharacteristics)Mooring mast .Night lighting facilities LFSeaplane base with ramp, beach, and handling facilities \Anchorage with refueling and usual harbor facilities Jt»Protected anchorage with limited facilities t.18
SIGNS, SYMBOLS, AND ABBREVIATIONSAirway light beacon.(arrows indicate course lights)Auxiliary airway light beacon, flashingAirport light beacon with code light(within airport symbol)Airport light beacon without code light(within airport symbol)Landmark light beacon with bearing projector(arrow indicates fixed beam pointing to airport)Landmark light beacon without bearing projector .Radio station with call letters and frequency Y " RS (wur IMO)Radio direction-finder station with call letters andfrequency (radio-compass station). —————— o BCINOW 30101Radio beacon with call letters ——————————— Q RBn(wRO)Radio range beacon �—— Q RRBr,[Single track . —— . —i——————IRailroads Two or more tracks ————— . —H——————I[Electric-— —————————— . H———i———iProhibited area.- .Prominent transmission line.High explosive areafMarked.I Unmarked- - &Highway, prominentHighway, less prominent19
CORPS OF ENGINEERS6-7Road or trail, prominence uncertainOil well derrick ———Obstruction —————— ——— 257(numerals indicate height above ground in feet)Prominent elevation- ———————(numerals indicate height in feet)GRADIENT OF ELEVATIONSMAXIMUM9000700030006000200010000 FEETSECTION IVMILITARY SYMBOLS 7. GENERAL RULES.—a. Color.—When colors are used, military symbols representing objects in territory occupied orcontrolled by our forces are shown in blue, and those in territory occupied or controlled by the enemy are shown in red.The only exceptions are the following:(1) Symbols for areas to be covered by friendly fire or gas,although generally located in enemy territory, are executedin blue.(2) Symbols for gassed areas, wherever located, are alwaysexecuted in red.b. Unit designations.—The positions of various letters,numbers, or abbreviations designating definite units withrespect to the symbol representing the type of unit are asfollows:(1) Serial numbers of armies and corps are placed withinthe symbol for troop units when considered collectively.Army is shown by number spelled out. Corps is shown byroman numerals. Serial numbers of divisions, brigades, regiments, separate battalions, separate companies, or similarseparate units are placed on the right, using arable numerals.When separate units are designated in this manner, thenumber of the unit will be followed by an abbreviated explanation showing the size of the unit thus designated.20
SIGNS, SYMBOLS, AND ABBREVIATIONS7(2) Numbers designating battalions in a regiment areshown on the left, using arable numerals.(3) Letters designating companies, troops, or batteries arein capitals and are shown on the left. Companies, troops,batteries or platoons (not separate), and other elements of aunit which are designated by name instead of by letter (forexample, "Antitank Company" or "Headquarters and ServiceTroop"), are designated by the use of the proper abbreviationon the left.(4) Abbreviations for explanatory purposes are shown onthe right (see sec. VI). Abbreviations are used instead ofsymbols to show information that cannot be indicated by asingle symbol.(5) Calibers are shown by numbers and unit of measure, as37-mm, 155-mm, 12-in., .50-in. and are usually placed underthe symbol. Often the unit of measure is omitted.(6) In order to clarify the use of the various symbols andto insure uniformity, the following diagrams are inserted asa guide:Symbol indicatingsize(a) Smaller unitBasic symbolSuperior unitExample: 1st Battalion, 2d Infantry.Symbol indicatingsize(b) Company,troop,battery.flightSymbol of arm attalion,separatecompany.Example: Battery E, 62d Coast Artillery, Antiaircraft, Machine ��.419767'—42——421
7-8CORPS OF ENGINEERSSymbol indicatingsize(c)Army or corpsExample: Second Army 8. LIST OP BASIC SYMBOLS.—a. To indicate purpose orcharacter of activity.Military post or station; command post orr—iheadquarters ————— —————[——(lower end of staff terminates at locationof establishment represented)Troop unit. . . — -. ————(On large-scale maps where troop unitscan be shown to scale, this symbolmay be modified as follows so as toshow area occupied by units in columnor line and direction in which theyare facing: JLineAirdromeAirship hangar —— - —— —— ——Airship mooring mast— ———— — — — -Airport (landing field) ——————————— Airport (landing field advanced) ——— . i .«dvAutogiro —— — — . ——g r Ammunition . — . }Arsenal ——— —— — \Arsenal (gas generating) . — — .Balloon, ascension point „ .22
SIGNS, SYMBOLS, AND ABBREVIATIONSBalloon bed-———— ———————————Balloon barrage ascension point-—————.Barrage.—— — --- ——— ——— — Blue i59-mm HOW](size indicating the extent, and notationindicating type)Demolitions----— - -------— -.Depot (supply point).- ——— — — (Temporary depot in combat zone).Debarkation or embarkation pointDugout:Isolated- ——— — — -- ——In trench system -- -- - -- -.g G . fFGas-proof———— ———— ———————Entanglement:Wire Concealed -Gas:Area to be avoided ---—-----" (Area blanketed by smoke (time effective) .Area probably affected by gas cylindercloud — - —-—-——————.Area to be gassed, nonpersistent————. BlueGeneral hospital.23[Vx-——
8CORPS OF ENGINEERSLaboratory, experimental station, or provingground— . ———Leader gear ———.(An energized cable which may be provided to aid the safe pilotage of vesselsthrough free passages in mine fields.Symbol is used on chart to show exactlocation.)Message center —Mines:Individual (layout shown if practicableor area included) ----Chemical land mine ——Contact mines -(This symbol is used to indicate theactual number of mines and theirlocations. The arabic figures indicate the contemplated number ofmines in each line.)Controlled mines(This symbol Indicates one 19-minegroup, and a separate symbol isused for each group. As it appears here, the upper edge of thispage is assumed to be seaward;and on charts the symbols shouldbe correspondingly placed. Thelength of a mine group being 1800feet, the symbol is drawn to scale.Its position represents the contemplated disposition of the minegroup.)Mobilization point or area (capacity infigures) ��———24Msg9 or V7'5'V
SIGNS, SYMBOLS, AND ABBREVIATIONS8Net:Torpedo net (with gate)Antisubmarine net (with gate)Obstacle:IndividualXRoad block ———————————— ———— Bridge out . Post:Observation- —— — ./\Fixed underwater listening. .(IT)Visual signal-- ——— --OCPoint, any located (suitable description) — ————— .QPoint, distributing:For class I supplies.- ———— . (3)dpAmmunition —————— ——————— . 'Jl,1 dpArtillery ammunition —— —— —— .U-JdpSmall-arms ammunition ———— .(I,1 dpWater — . . (w) dpPrisoners of war ———————— — —————PVIProcurement district, headquarters . Railway center.Railhead . ( ) rReception center. —Replacement training center25
CORPS OF ENGINEERS8 School, commonly used —————— ———————————Found occasionally on old maps ———(f)nsH DsehSupply. (See Depot.)Ammunition, all classes ———————————————— Ammunition, artillery. ————————————— — — . [Ammunition, small armsClass I — —Gas and oil ————Water .Trains (supply, motor) :10Animal-drawn . } AnlRailwaySearchlightSound locator.Signal:Radio station . . — . .""J" or RSODirection-finder station (radio compass) �————————Rco or "»Intercept station. . ——Switching central .Switching central (located at commandpost)or cable terminal.Test station Wire on ground.— — —— — . ———— .26T' n*mt
SIGNS, SYMBOLS, AND ap.Trench for one squad- ——— ————— .(For each additional squad add onetraverse.)Weather station.b. To indicate arm or service or its activity.—These symbolsare placed within the symbols shown in a above when appropriate, except when otherwise noted.Air CorpsAirshipBalloonBalloon (motorized)Armored Force- —— ————————— ——— — — - C J(When used with arm or service symbol, indicatesmechanized unit.)ArtilleryCavalry:HorseHorse and mechanizedMechanizedChemical Warfare Service.27
CORPS OF ENGINEERS8Coast Artillery:Antiaircraft.—Harbor Defense —————— —————————————— «HDRailway --- -- ——————— ————— RyTractor-drawn . —————— -«CAi55-mmEngineers — ————— . — ————. ————— — ——— EInfantry — . ———————XMotorizedX MtzParachute — X PrchtMedical Corps. ———— — —Military Police . — — .MPOrdnance Department. . Quartermaster Corps. — ————— — .QBakery. . —JXClass I supplies.- — .)Gasoline and oil only*fRemount Service .QSignal Corps—.—SSignal Corps (aviation) . f Tank Destroyer. .TDTransportation Service . Veterinary Corps. .Vc. To indicate size of unit. —These symbols are placed abovethe symbols shown in a above, or are used for indicatingboundaries as shown in d below.28
SIGNS, SYMBOLS, ADD ABBREVIATIONS8Squad —— — — -Section.—— ————————PlatoonCompany, troop, battery, or Air Corps flight- —(Battalion, cavalry squadron, or Air Corps squadron. .11Regiment or group �—HiBrigade or Air Corps wing n or air force �xxCorps ——— ———————— ———— —————— —xxxArmy �—————————xxxxCorps area, department, or section of communications zone ——— —— —oooCommunications zone —————————— — —ooooGeneral Headquarters — ————GHQAir Force Combat Command— CCSoldier � —————————oAutomatic rifleman ——————— *. —— —oAssistant leader, or second in command.—— ——eLeader —— �———— Squad leader ———————— ———————————— d. To indicate boundaries and lines.Bombardment aviation, light (limit of radius of action) —————————————— — oo »ombU)OHQ reconnaissance aviation (limit of zoneof reconnaissance) .Observation aviation (limit of zone of reconnaissance) :Rear limit, army aviation.—- ** 2 obtnRear limit, corps aviation4197673-
8CORPS OF ENGINEERSAir force reconnaissance aviation (limit ofzone of reconnaissance) —————————Pursuit aviation (limit of radius of action).oopurSquad. - — . -.- — - —— ———————— . ——Section ——— - — .— ——— — ——————— . ——Platoon — — ————————Company or similar unit —————————— .— . —Battalion or similar unit. —————————— n ——Regiment or similar unit. — — — —— .— in —Brigade . —— —— - . ————— x —Division „ ———— .— xx —Corps ——— —— —————— —————— — --—— xxx ——Army, — ——— —— . — — ——— ————— xxxx ——Corps area, department, or section of communications zone — .- .—— ooo ——Communications zone .— oooo —Rear boundary of theater of operations-Front line —— — — — .—— GHQ —//// » ni rLimit of wheeled traffic by day .—— Ov ——Limit of wheeled trafllc by night .—— 7 ——Line beyond which lights on vehicles areprohibited . .—— \j\ ———— i ——Outpost line .Main line of resistance—Regimental reserve line. -— RRLimiting point. —Line of communication. .30—— ( C-
SIGNS, SYMBOLS, AND ABBREVIATIONS8Line of departure- . - ——LD ——Straggler line-.-- - ——["p"]——Prisoner of War Inclosure, IV Corpsp'w'ne. Weapons.Automatic rifle. --------- . . (Dotted when emplacement is not occupied,thus) — - - ---*.Machine gun - . - . ——».(Arrow points in principal direction of flre.When used alone it indicates machine gun,water-cooled, cal. .30.)(Machine-gun symbol under symbol of unit ofany arm indicates machine-gun unit of thatarm.)Antiaircraft . AA » Antitank gun (specify caliber) ———* J Antitank gun In position, showing principal di- 75rection of fire (indicate caliber by numeral) AT *Antitank gun emplacement with principal di- 37rection of fire. --------------——. ——— * AT *"Caliber .50 .„ —- , -5CLight --------- --- --.,*Machine gun (single gun)—— —— „ —.- . -- - j ,(Arrows indicate sectors of flre; shaded portionshows danger space when flre is placed onfinal protective line.)Machine-gun section (two guns)- --- - — - . ,31
8Gun————Gun batteryHowitzer or mortar.—CORPS OF ENGINEERS6. ——. *orHowitzer ormortar battery. . 4.2-in. chemicalmortar-.- — . 4.42 cm, ]t HOpen when emplacement is' unoccupied,thus——————' 6-or4- -u- i-4.80itiiLivens ��———————.re "-PMines, chemical land (individual)———————————— f. Special symbols for use in hasty sketches and on operations maps.Area occupied by a unit (2d Battalion, 3d Field(2-lJ3Artillery)Area occupied by corps troops (III Corps).Brush .-. -.Cultivated landStreamWoodsg. Roads.—Suggested road classification is shown below.This classification will not apply in all cases. When additional types are indicated suitable identification should bemade by improvised notation or legend.Hard surface- .Graded and improvedGraded, not improved-32
8-9SIGNS, SYMBOLS, AND ABBREVIATIONSPoor road.Trail. 9. APPLICATION OF SPECIAL SYMBOLS.—The following examples show the use of special symbols as applied to variousmilitary organizations and activities. These examples areintended to illustrate the method of combining basic symbolsand abbreviations in order to show the desired information.These are only a few of the possible combinations. Manyare more complete than necessary. Often the number of aunit, to those familiar with it, will indicate its activity.a. Air Corps.3d Air Force 701st Air Base Group\\ 701 AB901st Transport Squadron. . --—p 901 T7th Observation Squadron.--.---.-.—[ otlfl88th Reconnaissance Squadron ojsBRcn101st Balloon Squadron——————————--pgT IQI1st Staff Squadron.-- ——— — — - ———f istt301st Balloon Group————————————[ 1 301701st Bombardment Wing (Light)————— F» 1 701 Bomb ID532d Pursuit Group (Interceptor). ————fj ] 532 Pgp (l)Second Army fSg* second203d School Squadron. — ——— ———— ———[ ] 203 Schb. Armored Force.Headquarters Company, 1st ArmoredDivisiontHq lcb l I DivMilitary Police Platoon, HeadquartersCompany, 1st Armored Division. .MP33I Div
aCORPS OF ENGINEERSTransportation Platoon, HeadquartersCompany, 1st Armored Division——THq CZ) i DJV1st Reconnaissance Battalion. ———— . —— r— i RonRifle Company, 1st Reconnaissance Battalion—— o[c:51 iRcnWeapons Platoon, 1st Reconnaissance Battalion.wpn 0ICZ) i RonMotorcycle Platoon, 1st ReconnaissanceBattalionMid A lCDl i RcnArmored Company (Light), 1st Reconnaissance,Battalion .-.——. .-. clc-bl iRen1st Armored [r g] iCommunication Platoon, HeadquartersCompany, 1st Armored Brigade--comHq d3 i BrigHeadquarters Company, 1st ArmoredRegiment (Light),Hq ICZDJ i (UMaintenance Platoon, Service Company,1st Armored Regiment (Light).,,Moint s»rv icm] i (LIReconnaissance Company, 1st ArmoredRegiment (Light) — ———————Ron [o] nilMachine Gun Company, 1st ArmoredRegiment (Light),Bl 1 "
" 1. PURPOSE. This manual is intended to supply the in formation required by the map reader. Persons engaged in the preparation of maps should be guided by AB 300-15, TM 5-230, and by Bulletin 788, Topographical Instru
