Catches, CAA, CAL are summed. LFC and LFS are weighted averages. ML, Lc and Lbar are recalculated from summed CAL. All other observations are for fleet 1 (indicative)
multiData(MSElist, StockPars, p, mm, nf)
A hierarchical list of data objects stock then fleet then MP
A list of stock parameters
Integer the Stock number
Integer the MP number
The number of fleets