A mentally draining trek south through the Pacific Ocean awaits the fleet of the Volvo Ocean Race as they set sail for Auckland today.
After a fairly soft start, mainly light winds in the three legs so far, the fleet will set off from the Chinese port of Sanya in near boat-breaking conditions today, with 30 knots of wind and a nasty sea state forecast for the start of leg four.
It could make for quick progress to the equator but, once there, that's where the real mental challenge sets in. In the equatorial calms, the fleet will encounter around 400 or 500 nautical miles of light winds, meaning they will spend around a week making negligible progress. They ain't called the Doldrums for nothing.
The long, windless days drifting in up to 40C heat are what New Zealand sailor Dave Swete of Team Alvimedica rates as the toughest part of the race so far.
"It's been harder from the mental side of things than the physical challenge because you're sitting out there in 40 degrees of heat and you're not going anywhere for days, so it is a bit more of a mind game," said Swete.