VIII CONTENTS 



ILLUSTRATIONS (Continued) 



Figure Page 



12. Position plotting with Odessey Protractor 53 



13. Electronic Position Indicator_ 54 



14. Shoran equipment, ship installation 58 



15. Raydist equipment for ship station 62 



16. Raydist phasemeter and recording equipment 64 



17. Raydist ground station 65 



18. Corrections to Raydist distances for three-antenna system at 



the Red Station 67 



19. Corrections to Raydist distances for ship antenna system 67 



20. Record from Raydist brush recorder 68 



21. Hand sounding machine 73 



22. LL type electric sounding machine 73 



23. Registering sheaves 73 



24. Edo 185 (AN/UQN) echo sounder 75 



25. Precision Depth Recorder 77 



26. Edo 255-C shoal water echo sounder 79 



27. 808 type echo sounder 82 



28. Echo sounders installed on bridge of survey ship 88 



29. Interior of a hydrographic launch 89 



30. A modem oceanographic winch 91 



31. Bathythermograph winch 92 



32. Bourdon type bathythermograph (BT) 93 



33. Record of bathythermograph data 94 



34. Deep sea reversing thermometers 95 



35. Nansen bottle 97 



36. Sigsbee water cup and Tanner-Sigsbee reversing frame 98 



37. Hydrometer set 99 



38. Graph for converting apparent specific gravity to salinity 100 



39. Snapper type bottom sampling devices 101 



40. Scoopfish bottom sampler 102 



41. Phleger corer 102 



42. Dredge 103 



43. Induction conductivity temperature indicator 104 



44. Salinity bridge or salinometer 105 



45. Velocimeter . 106 



46. Meter bar and drafting instruments 108 



47. Edmonston beam holder 109 



48. One-barrel survey buoy 122 



49. Details of portable Shoran or Raydist shelter 125 



50. Hydrographic stamp No. 42 128 



51. Principle of drawing distance arcs when the station is off 



the sheet 130 



52. Drawing arcs with a protractor 133 



53. Principle of plotting angles without a protractor 134 



54. Systems of sounding lines 138 



55. Identification stamp used on fathograms 142 



56. Personnel stamp (visual control) 150 



57. Personnel stamp (electronic control) 151 



58. Stamps 45, 50, and 104 identifying electronic control 



equipment 162 



59. Facsimile of stamp No. 33, sounding apparatus 163 



60. Bar check and leadline comparison stamp 165 



61. Simultaneous comparison stamp 165 



62. Facsimile of stamp No. 34 ,. 166 



63. Facsimile of stamp No. 20 166 



64. Record of echo soundings — sextant fixes 167 



