Brief and rare footage showing the SBS doing a recce of a beach before an amphibious assault by the Royal Marines. This video was shot during an exercise in Brunei in 1997. The most important part of the beach recce had been done before this clip starts, as the SBS men are still underwater. Wearing rebreather apparatus, the SBS would have measured the gradient of the beach and its approaches. The consistency of the sand would have been examined to ensure its suitability for the amphibious assault.