编码震源既可用于陆上勘探也可用于海上勘探。

The coded source can be used not only in on-shore survey, but also in off-shore survey.

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他们采用了大量的技术，并针对海上勘探的特点和目的进行了一些小的改动。

"A lot of the technology is used for slightly different purposes offshore," Holloway said.

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但是北极地区，尤其是海上区域，基本未有石油勘探。

Nevertheless, most of the Arctic, especially offshore, is essentially unexplored with respect to petroleum.

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