Video Series Jocky Sanderson - SIV, Thermalling and the finer points of Paragliding From the Central Coast Sky Surfers Winter Series of talks. Roger Stanford discusses paragliding, SIV and cross country flying From the Central Coast Sky Surfers Winter Series of talks. Erica Caro on flying in paragliding competitions From the Central Coast Sky Surfers Winter Series of talks. Paraglider Line Trimming with Martin Havel From the Central Coast Sky Surfers Winter Series of talks.