Do the passenger's contact details have to be provided when registering?

The registration can also be made by a third person. So you can easily register under your name, but another person will then take part. Please note, however, that we will send all information about the activity and the short-term weather decision to the email and telephone number provided. 

Passenger details are important. Depending on the offer, the body weight or age of the participant may be required. Of course, the details of the actual passenger must be entered here.