Safety of underwater diving operations can be improved by reducing the frequency of human error and the consequences when it does occur.

The Navy, which is leading the underwater operation, has also dispatched a vessel with laser sonar equipment.

It's bad tactics to hurry an underwater operation.

The crew were instructed in the basics of underwater operation by diagrams traced in wet beach sand.

I've never known a major underwater operation that didn't have some surprises.

This enables underwater operation for long periods of time.

Blofeld commented, "The safety factor is paramount in all underwater operations.

The SIVA-55 unit they were using was developed for military underwater covert operations.

We've modified your team's gear for underwater operations.

Vale had never been fond of underwater operations.