Page 723 THE smooth sheet 7733 



EXTREME MAXIMUM SIZE 



33 _c Soundings 2.2 mm. 



50 .E Character of bottom 2.0 mm. 



78 c Position numbers 



52 ° and day letters 1.0 mm. 



231 398 274- 126 53,^ -^ 



PREFERRED AVERAGE SIZE 



2 3 4 5 6 7 5 3^ ^^,6 ^ 



^ "" f^ r Soundings 2.0 mm. 



fne qy vS 45 73 



57 c Character of bottom 1.8 mm. 



71 53 49 32 30 24 ^^ " _ .^. . 



-* 62 ^ Position numbers 

 ^^■s ^ ^ 81 o an(j ciay letters 0.8 mm. 



79 ' ■' 



23! 420 318 249 126 53 



100 e 



'' i 



DESIRABLE MINIMUM SIZE 



23S4234763 



-T 



fne,y5 "' 35 "g Soundlngs 1.8 mm. 



71 60 53 49 3z 3027 24 45 - Character of bottom 1.6 mm. 



crs 



s p fi H Position numbers 



62 o 



231^400 419 327 312 149 126 73 and day letters 0.6 mm. 



67 

 53 



i. 



k- one inch ^ 10 20 mm. 



I I mil I J mil il 



Figure 163.— Sizes and placement of sounding numerals and other data on smooth sheet. 



When the soundings are inked in the Washington Office the same procedure shall be- 

 followed and in addition, care must be taken to maintain the opaqueness of the inked- 

 data. 



7733. Orientation of Numerals 



Regardless of the direction of the sounding line on the projection, all numerals 

 representing soundings shall be oriented to be read from the south. Normally, the 

 horizontal axis of the numbers shall be east and west. Where the numbers contain too 

 many digits or the soundings are too frequent to permit this, they may be inked at 

 any convenient angle, provided they can be easily read from the south (see fig. 163). 

 It should never be necessary to turn the sheet to read a part of the soundings easily. 



