领航员对着太阳测方位后将船朝正北驶去。
The navigator took a fix on the sun and steered the ship due north.
加强全船巡视检查，勤测各液体舱及污水沟等。
Reinforce to patrol vessel and measure the liquid tank and bilge water well frequently.
采用航磁数据向下延拓到海面代替船测数据，可提高磁力测量成果的综合利用率。
Aeromagnetic data downward continuation to sea level instead of Marine magnetic survey data can improve use capability of survey data.
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