Light winds continued to cause chaos to the racing schedule of the ISAF Sailing World Championships in Santander, where over 1,000 are competing in ten Olympic disciplines.
Ireland's Annalise Murphy delivered a fifth place in the Laser Radial class single race before the moderate breeze died away.
The Rathfarnham sailor is now 21st by nation and must improve to 18th to qualify Ireland on this first opportunity to have a place for the Rio 2016 Olympics.
Meanwhile, London 2012 team-mates Ryan Seaton and Matt McGovern started their world championships in the men's 49er skiff event when they placed second in the opening race.
The pair then had a 15th and a discarded result and lie ninth overall after day one.
Meanwhile, in the women's skiff event, Andrea Brewster and Saskia Tidey - the 49er FX new to the Olympic line-up - posted two mid-fleet results in their opening two races.
And, like almost all the other classes, their final race of the day fell victim to the near calm conditions.
Murphy's counterpart in the Men's Laser standard class gold fleet, Ballyholme Olympian James Espey, slipped to 34th overall from the fleet of 150 boats that started this event last Friday.
Espey has already qualified Ireland last Saturday when he achieved gold fleet and the qualifying standard after four races.