International Certificate of Competence Come and take your ICC with us. Sail or power, the exam takes approximately half a day and includes practical and theory. Also ICC preparation courses. If you're choosing to cruise the European inland waterway you will need the CEVNI part of the ICC. This test takes approximately 40 minutes using a multi choice question paper based on the RYA book of euroregs for inland waterways ISBN number 0-7136-5008-7.