Restrictions in place for Carrick-on-Shannon Rowing Regatta Waterways Ireland has advised all users of the Shannon Navigation of navigation and mooring restrictions Reporter: '); Waterways Ireland has advised all users of the Shannon Navigation of navigation and mooring restrictions in Carrick-on-Shannon to facilitate the Rowing Club Regatta on Sunday, August 1, 2021. The Regatta will be held on a 500 metres stretch of water immediately south of the town bridge commencing at 9am and finishing at approximately 6pm. Craft wishing to make a through passage will be facilitated every 2 hours approximately, during the course of the regatta. Only vessels of an overall length of 22ft. / 6.8m or less will be permitted on the floating jetties from Wednesday, July 28 to Sunday, August 1.