Putnam, G. R. (George Rockwell), b. 1865 · New York, J. Wiley & Sons; [etc.] · leaf 70
n to tbfl H to $ into $ eO $ St n ft rt (()§$& ,»$ «* 3 * 1 I f »■ <4 n % 76 %<& & ■• 4 2 ■8 **%$% i 8 18 * .-icte ,fi- 0 8 i»? »/ s .18 I, » h sbV2 * 5 % OS o >- > (/) X o * 1 oc <O O ± o 1- V) -DC O o - Q_ o O o 3 . ° (X … Dragging for Dangers 55 merged floats. Less accurate but useful informationas to currents is obtained from the logs of vessels. Dragging for dangers has long been resorted to forthe investigation of isolated spots. A valuable andsuccessful means has been employed recently of mak-ing sure that an…
Nautical charts
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