VESSELS breaking speed limits in Gladstone Harbour will now be caught by laser radar speed guns.
It is the new weapon in Maritime Safety Queensland's compliance campaign.
MSQ general manager Patrick Quirk said the Lidar unit was identical to laser speed radars already being used by police on the roads.
"There's one important difference - speed is measured in knots instead of kilometres per hour," Mr Quirk said.
This is the first time that local marine inspectors have been trained both to use the speed guns and to issue on-the-spot fines. The fine for exceeding Gladstone Port's six-knot speed limit is $200.