The former being the most commonly used.

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Note added at 8 mins (2013-06-21 19:59:31 GMT)
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http://www.amazon.co.uk/Work-Nautical-Surveyor-Institute/dp/...



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Note added at 10 mins (2013-06-21 20:01:43 GMT)
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http://www.nautinst.org/



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Note added at 13 mins (2013-06-21 20:03:58 GMT)
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http://trid.trb.org/view.aspx?id=401913

Excerpts are presented from a book entitled The Work of the Nautical Surveyor. The introduction is reproduced, followed by a list of the fields within which the nautical surveyor makes a professional contribution. These fields are organized into four classes: statutory, official and semiofficial, contractual and planning. The legal status of surveyors is then discussed, after which definitions of various types of survey are presented. The excerpts conclude with explanations of two types of survey companies, marine surveyors and underwriter surveyors, and of two legal entities, 'nautical assessor' and 'expert.'

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Note added at 14 mins (2013-06-21 20:05:12 GMT)
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ASker : you give no context so I can only offer a dictionary type term in exchange.