 However, many supporting fire practices, both by aircraft and warships, were strictly limited due to safety precautions for the Marines conducting maneuvers along the beach.The outcome of these exercises convinced the Marines that better landing craft and boats were needed, as well as more dependable communications equipment and techniques.The Fleet Landing Exercise Number 2 was conducted from January 4 to February 24 in 1936 marking the beginning of the Culebra/Vieques Inner Range or the Culebra/Vieques Complex as it would be known until 1975 and the closing of the Culebra subranges.