8511 



HYDROGRAPHIC MANUAL 



Page 794 



Fathometer Tide Observation 3 



Position 



NU: 



with Cuts 



'/\ 



at Buoy 



^ 



8511. Monthly Progress Sketch 



The monthly progress sketch shall be submitted as soon as practicable after the end 

 of each month. It should be made on tracing cloth with black ink only. The sketch 

 and title should be neat and legible but expert penmanship is not required; mechanical 

 lettering sets should be used. 



The scale of the progress sketch is usually stated in the project instructions 



(see 1218) ; otherwise it shall be that of the 



SYMBOLS FOR PROGRESS SKETCHES ur i J i i • ^i i- j^ 



published chart covermg the entu-e area of 



Buoys: Buoy Station O or • ; Astronomic Location -(^ or -4" tllC SCaSOu's WOrk. PrOgrCSS skctchcS of 



R A R. Station © or ® ; Astronomic Location -(^ or -^ COastal SUrVCyS lu tllC Philippine Islauds 



Magnetic Station p" Tide Gage O T G. Serial Temperatures should, if practicablc, bc OU a SCalc of 1 :100,000 



(the scale of Philippine coast charts); for 

 harbor surveys a larger scale may be used, if 

 necessary, to show the triangulation clearly. 

 The size of a progress sketch, in inches, should 

 be no larger than is required to include the 

 season's work, regardless of the size of the 

 chart. 



Each progress sketch shall contain a title^ 

 similar to those on smooth sheets, giving the 

 following information: class of work, locality, 

 scale, project number, dates of survey, name 

 of vessel or party, and name of Chief of Party. 

 The scale may be given as a ratio, or by 

 referring to the chart from which the projec- 

 tion has been traced. 



The progress sketch must contain a pro- 

 jection and just enough shoreline and geo- 

 graphic names for easy identification; detail 

 should be omitted so that all field work 

 accomplished can be clearly shown. 



Progress for all types of work should be 

 added each month. The information should 

 be generalized, the principal object being to 

 report areas surveyed and in a way so that 

 the information can be transferred to the 

 Office progress charts; actual sounding lines 

 should not be shown. 



As the survey sheets are laid out (see 



1361), their limits should be shown and 



identified by field numbers on the monthly 



progress sketch, if this is practicable without 



confusion; otherwise the sheet layout diagram on a separate tracing should be forwarded 



to the Washington Office with the progress sketch each time additional sheets are laid 



out. (See also 1542.) 



A new monthly progress sketch shall be started at the beginning of each season, and 

 continued throughout the season, irrespective of fiscal years. The results of each 

 month's work are added from month to month. Monthly progress sketches will be 



Both ends observed Z_s O 



One end not observed Zjt O 



Sun Azimuth 



TautWire 



Taut Wire with Acoustic Measurement » 



Log .. ._ .. .. .. .. 



Acoustic > (Arrow Points to R.A.R. Station) 



Acoustic > ^ ( Measured in Both Directions) 



Taut Wire ■ Sun Azimuth 



Taut Wire • Sun Az. with Acoustic Distance j 



Log • Sun Azimuth 



Acoustic Distance ■ Sun Azimuth 



Hydrography; Area Surveyed 



Topography: 



""""'%„A 



Wire Drag Areas: 



m. MAY //'^ 



Triangulation; 



New Stations A 



Recovered Stations \(/y 



Base line __^^^^.^^^^_.^_^_ 



Main Scheme 



Intersection Directions 



Observed one Direction L\ 



Figure 185.— Symbols for progress sketches. 



-A 



