Police divers were caught in action at Glynde Reach, a small river near Beddingham, by Sussex Express photographer Peter Cripps today (Thursday June 27).
Luckily it was all a training exercise by the Sussex Police Specialist Search Unit (SSU).
SSU officers search where other police officers cannot go.
They are trained to search in demanding environments that need specialist equipment, such as underwater, at height, in flooded areas and confined spaces.
The team are experts in searching for missing people, stolen property, drugs, weapons and firearms, and are also licensed to find and identify improvised explosive devices.
A police boat is used by the unit to undertake marine patrols along the Sussex coastline and during diving operations.