Where would you obtain data on currents for areas of the world not covered by the National Ocean Service().
我国海图作业规则规定,海图作业时,应在计划航线(推算航线)上标注()。 Ⅰ.计划(推算)航迹向;Ⅱ.罗航向;Ⅲ.罗经差;Ⅳ.风流压差;Ⅴ.船位差;Ⅵ.风流资料。
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