Putnam, G. R. (George Rockwell), b. 1865 · New York, J. Wiley & Sons; [etc.] · leaf 154
Vertical Angles 139 obtained by comparing such soundings with thosegiven on the chart for the position carried forward bydead reckoning, If a number of soundings are takenand plotted on a piece of tracing paper, spaced by thelog readings to the scale of the chart, and this tracingpaper is laid over…
Nautical charts
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