Brazil has a large maritime industry due to its extensive coastline and river systems. The country has over 8,000 km of coastline and 8,500 km of navigable rivers. The maritime industry employs over 78,000 workers, concentrated in Rio de Janeiro, Pernambuco, and Amazonas states. The main drivers of growth have been the end of Petrobras' monopoly in 1997, local content laws requiring domestic sourcing, and most recently the discovery of pre-salt oil reserves over 200 km offshore. This has led to a boom in orders for offshore oil and gas support vessels to enable development of these deepwater fields. Brazilian shipyards have seen their order books grow significantly in recent years to