Several problems here. One is that the sharks can still see the fishy and yummy silhouette of the surfboard. Two, sharks could investigate electric pulses so any electronic device in a surf board could cause problems (unless maybe designed as deflector). They use electroreceptors to find hidden preys.
Other problem is that fish schools or other surfers could trigger the alarm leading to a very stressing day of beach for everybody.
But is a interesting problem and anything that can do that people do not resemble a seal is good for people and also for sharks. Even if is a real shark, and not a dolphin or an unprobable tuna, you will have just seconds to prepare for the hit.
Other problem is that fish schools or other surfers could trigger the alarm leading to a very stressing day of beach for everybody.
But is a interesting problem and anything that can do that people do not resemble a seal is good for people and also for sharks. Even if is a real shark, and not a dolphin or an unprobable tuna, you will have just seconds to prepare for the hit.