| underwater camera | 2.70 | ...underwater camera equipment. | ||
| underwater search | 1.12 | An official said the underwater search would resume at first light. | ||
| underwater pipeline | 0.99 | Another clarified when an underwater pipeline was a hazard to navigation. | ||
| underwater microphone | 0.92 | Sounds emitted by the dolphins were recorded with an underwater microphone. | ||
| underwater robot | 0.92 | Perhaps it would be more practical to build an underwater robot. | ||
| underwater cable | 0.86 | Underwater cables permitted instant communication between the continents. | ||
| underwater mine | 0.79 | The attackers were believed to have set off underwater mines. | ||
| underwater photography | 0.79 | The underwater photography is awesome. | ||
| underwater world | 0.79 | Imagine being able to sense the underwater world as well as a dolphin can. | ||
| underwater vehicle | 0.66 | Mitsubishi is hoping to use the same technology to propel underwater vehicles. | ||
| underwater explorer | 0.59 | His father Jacques was an underwater explorer. | ||
| underwater sonar | 0.59 | The Navy is shipping underwater sonar equipment from Vietnam to assist. | ||
| underwater tunnel | 0.59 | The wreckage was found during work on an underwater tunnel at the port of Olbia. | ||
| underwater video | 0.59 | The preliminary study was based on underwater video and trawling. | ||
| underwater work | 0.59 | Underwater archeological work is tedious and time-consuming. | ||
| underwater device | 0.53 | He helped develop the Aqualung underwater breathing device for divers. | ||
| underwater park | 0.53 | There is talk of one day transforming the waters into an underwater park. | ||
| underwater volcano | 0.53 | Vast gold deposits may lie near underwater volcanoes. | ||
| underwater canyon | 0.46 | Or the time the sub nearly became trapped in an underwater canyon. | ||
| underwater demolition | 0.46 | - He is an underwater demolitions expert and a certified hypnotherapist. |