Almost £30,000 of drugs were seized when a police dog searched a car and caravan which had been stopped in Great Yarmouth.
The vehicle had been stopped as part of Norfolk Constabulary's Operation Moonshot.
Police dog Maggie found Class A drugs with an estimated street value of £28,000.
Cash was also found and one person has been charged with multiple drug offences.
Operation Moonshot was first launched in west Norfolk three years ago.
It uses automated number plate recognition (ANPR) cameras which provide live intelligence to officers on patrol.
Since April 2016, police have made 679 arrests, seized hundreds of uninsured or unroadworthy vehicles and found large quantities of drugs and stolen property.
It is now being used in Great Yarmouth, after Norfolk's police and crime commissioner Lorne Green revealed he was making £190,000 available to set up the system in the east of the county.
He said the aim was to complete a "ring of steel" which could more easily detect people coming in and out of Norfolk with "malign intentions."
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