Complex sentence: In Sea Scouts, youth are called "Sea Scouts", units are referred to as "Ships" and many ships have adopted names in addition to their ship numbers (ex: "Sea Scout Ship Eagle", "S.S.S. Liberty", etc.).
Split into simpler sentences: In Sea Scouts, youth are called "Sea Scouts", and units are referred to as "Ships". Many Ships have adopted names in addition to their Ship numbers (ex: "Sea Scout Ship Eagle", "S.S.S. Liberty", etc.).