What people are saying - Write a review
We haven't found any reviews in the usual places.
Marks and Marking Contents 1 Introduction 2 Siting of Marks
Plumbing of Observing Marks
10 other sections not shown
Other editions - View all
adjusted Admiralty Admiralty Tide Tables alidade amplitude anchor angle bar check beacon beam boat bottom calibration Chapter chart datum co-tidal chart coastline constituents correct curve Decca described direction distance diurnal drag sweep echo sounder echo trace errors false echoes fathoms float foul frequency frequency modulated harmonic height heliograph high water inches indicate kite kite wire leadline length lines of sounding logship low water lowering lines marks measured method metres Metres Feet Fms modulated moon mooring necessary obtained Oropesa Sweep otter paper period phase plotted position lines possible pulse radar range recorder reduced scale sea bed Section semi-diurnal sextant ship ship's shoal sinker skywave sonar sonar sweeping sounding datum speed speed of sound station pointer stylus surveyor sweep wire theodolite tidal observations tidal stream tide gauge tide pole tide raising force Tide Tables transducers transmission transmitting usually vertical vessel whilst wreck zero