The kayaker was unable to make it through the waves to the beach, and had to set off his personal locater beacon to summon help.
By the time rescuers got to him, “He’d been bounced around in the swell for about three hours.”
He spent 30 minutes in the water and was extremely hypothermic, letting go of his capsized vessel when rescuers arrived.
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http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=12018237