Routine hull checks are out, and underwater robots are in. Here is how Customs’ new high-tech fleet plans to track down ocean-bound smugglers.

Two sea drones have completed patrols across Northland's coastlines to monitor international marine traffic for potential narcotics smuggling.

Routine hull checks are out, and underwater robots are in. Here is how Customs’ new high-tech fleet plans to track down ocean-bound smugglers.