The Norwegian Maritime Authority (NMA) says it will purchase three new sulfur sensors and up to five drones to help enforce sulfur and other regulations for ship emissions.

The move follows what was declared to be a successful testing of drone technology over this past summer.

“Sulphur emission control exhaust will now be expanded to a larger geographical area than today, and the control will become more effective,” says Thomas Angell Bergh, Head of Section for Inspection, Audit and Emergency Preparedness.