Cursus For experienced climbers, the ACLO organizes a lead climbing course. In 2018-2019 this course will be given in period 4A and 4B on Thursdays from 19.45 – 22.00. If you want to participate in this course, you have to be able to climb 5b and 5b routes stably. Therefore, the first course day will be the selection day. After that there will be a compulsory lesson 3 times at the Sports Center. After these lessons you will go to Bjoeks three times (€ 6 entrance fee each time). Upon successful completion of this course you will receive the NKBV certificate for indoor climbing.