Three children were rescued by lifeboat and helicopter crews after their boat became stranded on mud.
An adult was aboard the speedboat with a 12-year-old boy and two 15-year-old girls.
The boat was about two-and-a-half miles off the coast of Riverside Country Park, near Horrid Hill.

The RNLI Sheerness inshore lifeboat was launched at 4.58pm on Wednesday to help the four stranded people and two crew members made their way to the casualties across the mud.

A short while later the crew called in the Sea King Helicopter from RAF Wattisham, in Suffolk, and it winched them to safety, landing at the country park in Lower Rainham Road, Gillingham.