7. REPORTS AND MISCELLANEOUS 



243 



quired, make a recommendation as to how 

 this should be done. 



J. Comparison with prior surveys. — Each 

 item in the presurvey review which is within 

 the limit of the survey must be listed and 

 discussed. State whether the existence of 

 the feature was verified or disproved. Make 

 a specific recommendation as to whether the 

 feature should be charted, moved in posi- 

 tion, or deleted from the chart. The least 

 depth obtained on submerged features 

 should be given. 



In addition, compare the results of the 

 new survey with those of prior surveys of 

 the area, identifying the latter by registry 

 numbers, dates, and scales. State the gen- 

 eral agreement or disagreement between the 

 new and the old surveys, and give conclu- 

 sions reached as to the reasons for differ- 

 ences found. List any other features or 

 depths on prior surveys whose existence has 

 been disproved and which should be deleted 

 from the charts. Include bare rocks as well 

 as subsurface features and depths. 



Compare the new survey with any surveys 

 in the area by the United States Corps of 

 Engineers. The Engineers surveys should 

 be identified by date, scale, and sheet num- 

 ber, and should be forwarded with the smooth 

 sheet. 



K. Comparison with the chart. — Compare 

 the survey with a copy of the largest scale 

 chart of the area, identifying the chart by 

 number and print date, and give similar 

 information, without duplication, to that re- 

 quired for prior surveys. Charted features 

 bearing the notation "reported," "ED," or 

 "PD" must be specifically mentioned and ap- 

 propriate recommendations made as to future 

 charting. 



Tabulate and describe the important neivly 

 found dangers to navigation giving the lati- 

 tude and longitude of each and the least 

 depth on each with its position number. 

 Mention specifically each danger reported to 

 the United States Coast Guard. 



Dangers and shoals found or investigated 

 by wire drag should be listed separately. 

 Least depths and clearances obtained shall 

 be stated. 



L. Adequacy of survey. — State whether 

 the survey is complete and adequate to su- 

 persede prior surveys for charting. Identify 

 any part of the survey that is incomplete 

 or substandard in any way. 



M. Aids to navigation. — Refer to the sep- 

 arate report on Landmarks for Charts and 

 Fixed Aids to Navigation. If there has been 

 correspondence with the United States Coast 

 Guard regarding the location or establish- 

 ment of floating aids in the surveyed area, 

 references shall be made thereto. It is not 

 necessary to list each floating aid by geo- 

 graphic position and characteristic. How- 

 ever a comparison shall be made with data 

 in the latest Light List and with the largest 

 scale chart of the area. The hydrographer 

 should state the results of this comparison, 

 and indicate whether or not the aids ade- 

 quately serve the purposes for which they 

 were established. 



List all unofficial aids to navigation not 

 shown in the Light List stating their pur- 

 pose, whether maintained and by whom, and 

 whether such maintenance is seasonal or not, 

 if this is known. Give the position and de- 

 scription of each aid and the date of estab- 

 lishment if known. 



List all bridges and overhead cables not 

 shown on the chart. State bridge and cable 

 clearances if measured by the survey party. 

 Mention any submarine cables and pipelines 

 and ferry routes in the area and give the 

 positions of their termini. 



N. Statistics. — Give the total number of 

 positions and nautical miles of sounding lines 

 for each ship or launch employed on the sur- 

 vey and the total area in square nautical 

 miles for the sheet. Tabulation of statistics 

 for each day is not required. 



A summary of other statistics concerning 

 the survey may be included such as the num- 

 ber of tide, current, oceanographic, and mag- 

 netic stations, and the number of bottom 

 samples obtained, etc. 



O. Miscellaneous. — Include in this section 

 any information of scientific or practical 

 value resulting from the survey and not 

 covered in previous sections. Where silted 

 areas are detected the discussion should in- 



