But his line of fire could easily keep boarders off the survey vessel once it got under way.

Notwithstanding this role, she was forever a survey vessel first and foremost.

"Are we not to send out the survey vessels then?"

But the survey vessels are down to fewer than a dozen.

She was used as a survey vessel from 1906 and was sold in 1923.

She was converted into a survey vessel in 1902.

She was used as a survey vessel until paid off in 1868 and sold in 1870.

She was used as a survey vessel from 1857, and a training ship from 1873.

Information comes from field inspections, survey vessels, and various harbor authorities.

The survey vessel is staffed by a crew of twelve.