he's found a place that regularly produces record breaking sets. a phenomenon fueled by a massive underwater canyon just offshore that powers the swells from three miles deep. for generations fishermen were practically the only souls willing to brave the dangerous surf. >> thousands of people die here because the waves. >> so did you grow up fearing the waves? >> no. respecting. >> it's dawn on the morning of the big swell. mcnamara and his team dart around, making their final preparations. including film crews from around the world. this american team from the go big project has been following mcnamara for months. >> garret said got to have the pov angle. >> for a surfing adventure show called "maverick moments" launching this fall. the hunt is on for big mama. with the swell now at full strength -- >> i want to go get a big mama. big mama. moving so fast.