The demands of the marine working environment, coupled with the demand for large-scale structures, have led to the development of a great many types of specialized and advanced construction equipment. Indeed, the response of equipment manufacturers and constructors has been rapid and effective. The availability of construction equipment of greater capabilities has in turn played a major role in altering construction methods and in making technically feasible and economically justifiable complex structures in extremely demanding environments. These developments will continue as industrial development, principally the offshore petroleum industry, military requirements, and maritime commerce, continue their current rate of growth.