If you intend to sail a water scooter or use jet skis, you must hold a power boat license and observe the regulations for preventing collisions at sea.
The regulations apply to you as a user no matter whether you own or hire the water scooter/jet skis.
You must be at least 16 years old to acquire a power boat license.
More info about power boat licenses
Remember that all use of water scooters/jet skis must be in accordance with the current regulations for preventing collisions at sea.
The regulations for preventing collisions at sea are available here (in Danish).
The use of water scooters and jet skis is permitted only at a distance of 300 metres from the coast, except for transportation to the 300-metre zone which must be perpendicular to the coast at a speed of maximum 5 knots.
It is prohibited to use water scooters/jet skis in nature reserves and local prohibition zones - for more information (in Danish) see the website of the Danish Environmental Protection Agency under the headline "On the sea".
Furthermore, it may be a good idea to have a talk with the local port office to learn whether there are special regulations on the use of water scooters in the area - for more information (in Danish) see the website of the Danish Port Pilot.
Buying or importing a water scooter
When you buy a water scooter in Denmark or import a water scooter from a country outside the EU, you must be aware of the requirement for CE marking. Water scooters constructed in an EU country after 1 January 2006 must be furnished with a CE mark.
Furthermore, water scooters that have been imported from a country outside the EU and that have been put into use or on the market for the first time in an EU country after 1 January 2066, must be CE marked.
It is especially the many requirements for the emissions from engines and noise that you should take a closer look at.