#description: fixed M, no qSurvey, fixed steepness
natM_type;          1Parm        
natM_n_breakpoints; NULL  
natM_lorenzen;      NULL
natM_val;           c(NA,NA)
par_name;           LnQ_base_3_CPUE
par_int;            c(NA)
par_phase;          c(-1) 
forecast_num;       1 
