Complex sentence: The main building is the Centro Andaluz Superior de Estudios Marinos; "CASEM" which offers studies in Marine Environment and Marine Resources, Seafaring, Marine Engineering, Naval Radioelectronics and Naval Engineering.
Split into simpler sentences: The main building is the Centro Andaluz Superior de Estudios Marinos. Its Marine Science departments constitute the CASEM "(Centro Andaluz Superior de Estudios Marinos)", which offers studies in Marine Environment and Marine Resources, Seafaring, Marine Engineering, Naval Radioelectronics and Naval Engineering.