475 metres ! That's amazing. Google Earth estimate. 450m+ easy.
I was on a really really big board. There was about 50 other craft out there, including a stack of longboarders on the inside section, maybe 2 wave-ride-skis, another 4+ kids inshore on skis, and 2 racing ocean surf skis, and 2 plastic ocean kayaks, and only 3 SUP's. I was plucking off the wide ones, and riding them all the way down to the Timber Erosion Fence.