TOPOGRAPHY 49 



STREET NAMES (Fig. 20) (1-26, -26a, -le) 



Street names shall be charted along the waterfront of important harbors on charts 1 : 12,000 

 scale or larger when recommended in the Specifications. 



RAILROADS, RAILWAYS (Fig. 1) (H-3, -3b, -3c, -14) 



A single .008" line is used for both single and double-track railroads. In the case of 

 railroad yards, either enough of the tracks are represented to indicate the area covered, or the 

 limiting tracks and an appropriate legend are shown. City electric railways are generally not 

 charted. 



BUILDINGS (I-3a,-5) 



Prominent buildings along the waterfront and large individual buildings back from the 

 waterfront that are of navigational assistance to mariners are shown on charts 1 :40,000 scale 

 or larger. No other buildings are shown. Buildings represented by a symbol smaller than 

 one-eighth of an inch shall be charted in solid black. Larger buildings shall be outlined in 

 black and cross-hatched. 



A prominent feature on a building may be shown by a landmark symbol and labeled when 

 specifically recommended for charting as a landmark. 



CHURCHES (1-8) 



Church buildings considered to be prominent features, but which have not been recom- 

 mended as landmarks, may be charted by their symbols, thus: t 



AIRPORTS (Fig. 20) (1-23, -24, -Tc, -Id) 



On large-scale cha.rts, the limits of runways of commercial airports shall be shown. 



When a commercial airport is to be shown on a small-scale chart, the symbol shown on 

 Chart No. 1 (item I -Id) is to be used. 



All reference to military airports is omitted at present. 



MILITARY FEATURES 



No name or symbol relating to presently used fortifications or military installations shall 

 be shown on any chart. Roads or buildings in military reservations shall not be shown imless 

 requested by the Army or Navy. Prominent natm-al featm-es and official aids to navigation 

 must be charted. 



Objects of present military importance considered to be essential navigational features 

 shall be charted only with the consent of the proper militaiy authorities. 



