A wakeboarder jumps in the air at the international boat and watersports show 'Boot' in Duesseldorf, Germany.

Visitors watching powerful outboard motors at the international boat and watersports show 'boot' in Duesseldorf, Germany.

A diver in a tank watches an instructor at the international boat and watersports show 'boot' in Duesseldorf, Germany.

A surfer rides a wave during a contest at the international boat and watersports show 'Boot' in Duesseldorf, Germany.

A surfer rides a wave during a contest at the international boat and watersports show 'Boot' in Duesseldorf, Germany.

A surfer rides a wave during a contest at the international boat and watersports show 'Boot' in Duesseldorf, Germany.

Visitors pass a woman depicting a mermaid, promoting the German ocean foundation, at the international boat and watersports show 'boot' in Duesseldorf, Germany.