Page xiv contents 



Page 



Table 19. Index adjustments of Dorsey Fathometer No. 3 517 



20. Example of velocity correction computations ^ 532 



21. Echo-sounding instrument operation 551 



22. Ship's run corrections i. 654 



23. Paper distortion 659 



24. Projection line intervals for various scales _* 669 



25. Distance circle intervals for various scales 676 



26. Conversion of reduced sounding values to smooth-sheet values 716 



27. Depth curves 730 



28. Schedule of penciled and inked details 750 



29. Units for recorded soundings and corrections 763 



30. Adjustment of buoy traverse computed by geographic positions 864 



31. Rubber stamps for survey records 872 



32. Velocity of sound in sea water 873 



33. Salinity corrections (to be applied to table 32) 874 



34. Pressure corrections (to be applied to table 32) 875 



35. Velocity correction factors 879 



36. Velocity reduction factors for R.A.R 881 



37. Linear distance conversion — feet, yards, fathoms, meters 882 



38. Linear distance conversion — statute miles, nautical miles, kilometers 883 



39. Temperature conversion 883 



40. Map scales and equivalents 884 



41. Natural half-cosecants and half-cotangents 885 



42. Three-letter station names 887 



