6. THE SMOOTH SHEET 



211 



ATLANTIC & GULF COASTS 



h 8 



(2) or greater elevation 

 above MHW 



-"i 



MHW 



*^Ao *'^''elevation 

 "above MLW 



^ ^'^^or * awash at MLW 



MLW 



— * covered I ft at MLW 



PACIFIC COAST 



fl or greater elevation 

 above MHW 



-t- 



MHW 



Range 



of 

 Tide 



-X-'^^to -X- ''-^elevation 

 above MLLW 



"^'-Ur^ awash at MLLVJ 



MLLW 



j Z/?A or + 



Use the synnbol where the 

 depth was not determined 



^f covered I or 2 ft at ML L W — 



+ or ZRk - 



9 



8 

 7 

 6 

 5 

 4 1- 



LlI 

 UJ 



3 ^ 



2 



1 







1 



2 



3 



I 



REFERENCE 

 PLANE 



SYMBOL COLOR 



Source 



Hydro. 



Topo. 



ELEVATION COLOR 



Source 



Hydro 



Topo. 



ELEVATION 

 UNDERLINED 



SIZE 



Symbol 



Elev. 



J5) 



•RED 



BLACK 



'BLACK 



RED 



NO 



SHAPE 



2 mm. 



JS) 



ML(L)W 



■BLACK 



BLACK 



•BLACK 



BLACK 



YES 



2.2 mm. 



2 mn 



'Plotted in pencil and inked during Verification 



Always show rocks with symbols having 

 properly oriented lines and proper size 



Show a small reef with a rock awash symbol 

 Show elevation in parentheses, not brackets 

 Show bare rocks with open centers 



Avoid overlapping symbols by offset 

 or omission, but retain the bare and 

 offshore rocks 



CORRECT 



+ 



(Si 



* 



X 



INCORRECT 



4- 



[5] 







Avoid congestion by omitting 

 elevations of less importance 



(8) *f 





(6) ^(^' 





Avoid obscuring isolated rock symtiols with 

 small symbols and congested hydrography 



12 



18 



^7 14 



m 



Figure 81. — Top — Rock symbolization and elevations referenced to tidal datums. Center — 

 Color and size of rock symbols and elevation value. Bottom — Cartographic standards 

 and procedures for rock detailing. 



