Just wondering if someone is able to explain how and why this happens? Are they called 'bullets' ?

bullets? More like dodgy software! What a sweet graph that is though. All the stable green almost brings a tear to your eye eh?

it was probably like what i did last week - sailed out to the scarbs marker miles out.. ditched my gear - climbed the ladder stopped the anemometer, spun it really quickly.. lept off the platform, flapped like a bird, plummetted like a cocky hit by a shotgun, hit the water like a humpback... and made my fkn getaway..

swam like cr4p to my gear which was now a longway down wind.. sailed back to ob city , then realised i dont have access to the graph for the scarbs marker...

Where is the seabreeze wind reading taken from, the Gero airport?