To ensure perfect communication during the surf lessons, EasyDrop instructors are interconnected through a system of waterproof radios, not found anywhere else in the world.
With this system, it is possible to follow up with the student immediately after surfing a wave, while still inside the water, for the instructor behind the video camera passes on his observations concerning the wave caught by the student through the radio to his colegues in the line-up in the water.
Normally instructors would not be able to see what a student do on the wave (due to the wave itself being in the way).