According to the Swedish Sea Rescue Society, there were around 20 percent more registered ground hits last year. The persistently good weather and low water level are named as obvious causes; as a result, there was more boat traffic than usual, and more yachts and motorboats were out of the fairway looking for an archipelago berth.

Many designated accident sites are right next to the fairway and are buoyed
In order to reduce the number of accidents, the insurance company Länsförsäkringar Göteborg och Bohuslän started the Grundkollen initiative together with the sea rescue company and created a data set with the 60 riskiest shoals. With the help of the map service eniro.se, the position data of the danger spots can be viewed online. However, they can also be downloaded as a GPX file. In this way, the shallows can be automatically marked on many plotters.