By this day Jöns has covered in excess of 30 kilometer of ice. Some weak spots as well while there are fairly trustable ice too. As always it is important to test the ice one way or the other to avoid the weak spots. If it comes to swimming you need to be prepared with short spikes to get a grip on the ice to drag yourself up, and also to have change clothing, preferably in a rucksack that gives some boyancy at the same time.