Page 765 RECORDS and reports 815 



Where the same control stations are used for successive fixes, it is not necessary 

 to repeat the names; the word "same" or the hotter S, covering the three spaces occupied 

 by the fix, may be used at each position to indicate a repetition, provided that the 

 station names are entered for the first position on each page and every time any one 

 of the stations is changed. 



Supplemental angles, or cuts, observed at three-point fixes are recorded below the 

 corresponding fixes, preferably with one blank intervening space. The names of the 

 two objects, recorded clockwise, are entered on the same line with the "cut" angle. 



The recorded names of stations must agree with those on the boat sheet (see 3245). 



In addition to the systematically spaced positions, supplemental positions and 

 supplemental angles are often required as explained in different parts of this Manual. 

 Some of the most important of these are specified in 3312 and 3313. Others occur in 

 connection with locating buoys (see section 25) and hydrographic stations (243, 247, 

 and 248). Others occasionally required are; in connection with revision of the high- 

 water line (3244 and 381) ; to locate a vessel for use as a hydrographic station (3365) ; on 

 a navigational range to detennine its azimuth (3833); in connection with drawing form 

 lines from the vessel (382); to locate rocks, obstructions, wrecks, etc., (see 363, 364, and 

 365). 



If one of the objects of a three-point fix is a distant tangent, the height of eye must 

 be included (33366). If one of the objects is appreciably above the horizon, its vertical 

 angle must be included (3338). 



R.A.R. position. — R.A.K. distances are recorded in the Bomb Record and shall not 

 be repeated in the Sounding Record. The position numbers and symbols shall be en- 

 tered in the Sounding Record, and opposite the first number on each page the entry 

 "See Bomb Record" shall be made. Extreme care must be taken to ensure that the 

 times and nmnbers of the corresponding positions in the two 

 Records agree (see 6811 and 8311). 



All additional position data, such as log readings, eiigine 

 revolutions, and bearings, are recorded in the Sounding 

 Record (see 6811). Rubber Stamp No. 24 (fig. 179) shall be 

 used for this purpose so far as applicable. 



Supplemental positions, for which there are no R.A.R. figure i79.~-Facpimiie of stamp 

 distances, are often required in' connection with R.A.R. (see [hidings 

 3312, 3313, and 6812). Each of these shall be given a con- 

 secutive number. Since these are not entered in the Bomb Record, the result is that 

 the position numbers in the Bomb Record are not consecutive. 



Miscellaneous control data. — A numbered position shall be given to each entry of 

 control data which will be used in plotting the sounding line, regardless of its nature, 

 including the times at some changes in course (see 3373). 



Bearings. — Wliere recorded for use as position data, the number of degrees shall 

 be followed by T to indicate a true bearing, and by p.s.c. to indicate a compass bearing. 

 In the latter case the values of the variation and deviation shall be entered and the 

 bearing converted to a true bearing during or at the end of the day's work. 



Ranges. — Wliere sounding lines are run on pre-established ranges the positions 

 may be numbered and the data recorded in accordance with 334. 



815. Remarks and Miscellaneous Entries 



In the "Remarks" column shall be entered all additional information required 

 for the proper understanding and correct plotting of the work, for which provision 



No. 24 



Position No. . .f .'^ • . 



Log ^^..^0. 



R. C.....7A7.f.9.^ 



