codes used in sub samples - C+Y , Lp , U , Dp , C , Eld , Eth min, - definitions here http://dundrumssailingclubruralchallenge2012.blogspot.co.uk/2012/12/dard-rural-challenge-2012-definitions.html
see also - "Gwen" project - Dundrum Sailing Club to get it's first sailability modified Lightning
crew size = 2
C&Y = 1/2
Lp = 0/2
U = 0/1Dp = 0/2
C = 0/1
Eld = 0/2
Eth min = 0/2
100% Dp
50% Dp + U + C
50% Dp + Cy