In order to reduce the most of the harmful air emissions, the Norwegian Maritime Authority checks whether the ships comply with the current regulations regarding sulphur content in their fuels. In order to make their work more effective, Norway will now use drones, which will measure the sulphur content in the exhaust.
After several tests conducted earlier this year, it appears that drones can be an effective help in tackling sulphur emissions from shipping.
This is the result that chief engineer...
https://safety4sea.com/norway-to-use-drones-to-detect-high-sulphur-content-from-ships/