Italian offshore services provider Next Geosolutions (NextGeo) has acquired a geophysical survey vessel from Dutch company SeaMar Subsea for $21.5 million.The Deep Helder vessel will be renamed NG Surveyor, and will be used for geophysical, geotechnical, environmental, and UXO (unexploded ordnance) survey activities. Built in 2014, NG Surveyor is 64.8 meters long, 15.