TY - RPRT TI - A search and rescue simulation model for the United States Coast Guard : IV - programmer level documentation for "OPSIM AU - Saunders, P L B AU - Leyendecker, E E PY - 1971 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 10433 DO - 10.6028/NBS.RPT.10433 ER -