Alcock is racing manager of the Irish Sailing Association (ISA), and his lecture will outline the laws that govern racing by windpower on the water in Ireland, covering classes from yachts and dinghies to windsurfing, kitesurfing and more.
Topics to be covered include rights and obligations on the water, giving way, keeping clear, red flags and protest forms.
Sailors of all craft are invited to attend the evening, and anyone wanting to get involved in racing is also welcome, especially with the 2012 racing season only eight weeks away.
Alcock's talk takes place this Thursday at 7.30pm in GMIT Castlebar. The Galway Advertiser has more HERE.