The search effort included three helicopters , a C-130 transport and four Coast Guard vessels , including the cutters Aspen , Pike and Sockeye . The yacht was hit by several large waves , causing it to roll over , the Coast Guard says . A man who lives on a nearby island told CNN that he saw the boat go down and heard people screaming. The yacht race took place near the Farallon Islands , near San Francisco .
The yacht was hit by several large waves , causing it to roll over , the Coast Guard says . A man who lives on a nearby island told CNN that he saw the boat go down and heard people screaming. The yacht race took place near the Farallon Islands , near San Francisco .