Call me when the fog set in. Sound regulation whistle, attend to echo sounding and start radar at an interval not more than 20 minutes.

下雾时要叫我，鸣放汽笛，动用测深仪，启动一次雷达不要超过20分钟。

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In the traditional resistivity sounding method, the pole distance increases little by little with equal logarithm interval, which brings on grid irregular elements.

对于常规的直流电测深法，由于其电极距一般以近似等对数间隔逐渐增大，使得网格单元剖分呈现出不规则性。

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Fog sets in, call master at once. Began to keep on radar for detecting to the sea all round at an interval of every 20 minutes. Sounding by echo 52 fathoms. Standby Engine. Fog signal started.

雾起，立即召唤船长，开始保持每20分钟用雷达环扫一次海面，回声测深52拓，备车，开启雾号。

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