THIS is an excellent volume, and thoroughly describes the more complicated branch of hydrographical work, such as rivers, lakes, &c. The book touches very lightly on ocean surveying, and apparently is ...

PORTSMOUTH — The Portsmouth Athenaeum’s 2015 Program Series continues Wednesday, Oct. 21 at 7 p.m. with NOAA marine surveyor David Cole’s account of the evolution of hydrographic surveying, nautical ...

No audio available for this content. To improve the efficiency of their hydrographic surveying services and expand them, Coastal Geomatics evaluated multiple USV, choosing the CHC Apache 4. (Image: ...