Page 689 



THE SMOOTH SHEET 



744 



in making the triangulation station symbol neatly and symmetrically around the 

 station point. There are several methods of doing this. One method is to draw a 

 faiQt pencU circle 2.6 mm in diameter, and with a straightedge and an equilateral 

 triangle draw the sides of the symbol tangent to the circumference of the penciled circle. 



Triangulation station Buoy 



Figure 153.— Templates for triangulation station and buoy symbols. 



Another method is by means of a celluloid template cut to the correct size (see fig. 

 153). The perpendicular etched lines are used in centering the symbol and in orienting 

 it with reference to the projection lines. The small holes on the extensions of the 

 triangle sides are used to draw pencil lines as guides for drawing the symbol in ink after 

 removal of the template. Inking inside the template cannot be neatly done and should 

 not be attempted. (See also 4834 and fig. 96.) 



744. Station Names 



All of the station names shall be inked on the smooth sheet in vertical letters with 

 an over-all height of the upper case letters not to exceed 3 mm, and a thickness of ink 

 line not to exceed 0.5 mm. Slanting letters shall not be used for any station names. 

 Under this heading instructions are given only for station names (see 215 and 3245). 

 Instructions for geographic names are given in 787. Instructions for names of aids to 

 navigation are given in 7843, and instructions relative to miscellaneous notes are given 

 in 781 and 7825. The names of triangulation and topographic stp-tions shall be in red 

 ink, names of hydrographic stations in blue ink, and names of stations^ spotted from 

 the air photographic detail shall be in green ink. (See figs. 169 and 1.71.) ;^ 



Where only a part of the triangulation station name is used in the hydrogmohic 

 survey, this part shall be emphasized by underlining it in red inMs^ Where an .entirely 

 different name, arbitrarily selected, is given to a triangulation station, for use in the 

 hydrographic survey, the arbitrary name shall be inked in blue, followed by the triangu- 

 lation name in red and in parentheses. 



7441. Agreement of Names 



The station names on the smooth sheet must agree with those used on the boat 

 sheet, the topographic sheet, and in the Sounding Records. If there is any disagree- 

 ment between these three sources it must be investigated and corrected, and the name 

 actually used in the Sounding Records placed on the smooth sheet with an appropriate 

 notation in the various records to clarify the original discrepancy. 



465382 — 44 45 



