Police are appealing for information about a boat, engines and fishfinder.
Officers in Norfolk are trying to trace a grey and blue Sea Eagle 12.6 inflatable boat, a Honda 5HP outboard, a Demo Torpedo 1003 electric outboard and a Garmin 400C fishfinder.
Detectives have not revealed why they want to locate the items. A spokesman for the Norfolk force said: "It is believed that these items are currently being used as an angling boat in the East Anglia area.
"Officers would like to hear from anyone who may have seen these items in use, or have any information relating to them."
Anyone with information should call DC Claire Cox, at Thetford police station, on 0845 456 4567.