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HYDROGRAPHIC MANUAL 



Page 756 



show the relationship between these acts and their recorded times. Generally each 

 entry should appear on the same horizontal line with its respective time, but occa- 

 sionally, miscellaneous notes and entries may be made at other places and referred to 

 their corresponding times by distinctive reference marks. 



Figure 174.— Record of echo soundings— R. A. R. control. (Double page of Sounding Record reduced about one-half.) 



The approved manner of recording handlead, wire, and echo soundings controlled 

 by three-point fixes is shown in figures 172 and 173; and that for echo sounding con- 

 trolled by R.A.R. in figure 174. In these figures the limited space available has been 



