Video footage has captured the moment 28 pilot whales swam towards Sheerness yesterday.
The mammals were a mile out in waters off Garrison Point when a river maintenance crew was called to help at 11am to herd them back out to sea.
Sheerness Lifeboat was also on hand to steer the whales away from the busy shipping lane and possible danger.
The operation continued until 5.30pm. By that time, the whales had been escorted a further three miles out to sea and were no longer visible.
Dave Redwood, a member of the Briggs Marine crew based at Peel Ports, posted the video on YouTube.
There have been no reports of any further sightings since.