When I set off to cox most of 90 nautical miles across the Irish sea (my first ever rowing expedition) my idea of a long outing was less than 2 hours, and on a river.
But somewhere along the way, after the fabulous sunrise, the sight of the Welsh coast after a night of rowing out of sight of land, and then the arrival on it made me realise the incredible sense of achievement you could feel, despite being second last in a race (and I'm normally a bad loser).