Marine shipping insurance has existed since the late 17th century when sailors at Lloyd's coffee house in London would discuss insurance. Today, over 50,000 merchant ships internationally carry 90% of global trade. There are several reasons for requiring insurance, such as legal compliance, financial protection from losses, and protection from dangers at sea. Common types of marine insurance include cargo insurance, war risk policies, and insurance for ships under construction. Key parties in marine insurance are the carrier, charterer, consignee, and consignor. A bill of lading is a critical legal document that accompanies all shipments by sea.