Sailors need to know that lightning can strike out of a clear blue sky with no visual or audible warning .

That’s because the warnings are too far away to be seen or heard.

Trees, hills and mountainous terrain can block the sound of thunder, and cloud-cover can hide approaching storm clouds.

Thunder traveling at 770 mph can be heard from only 6 kilometers away, while lightning traveling at 80,000 kilometers per second, can strike from 16 kilometers away.

Too late to ever hear thunder. When you hear thunder, lightning has already happened, and you are within deadly range.

Believing that you can count seconds between thunder is one of the most dangerous mistakes boaters make.

ThunderBolt. Getting caught unexpectedly by a thunderstorm out on open water is the worst of all situations facing sailors.

Technology that can detect a thunderstorm from 120 kilometers  away, and track it to the boat while giving him estimated time of arrival, is what every sailor has waited for.