The Stoomvaart Maatschappij Nederland ("Netherlands Steamship Company") or SMN, also known as the Netherland Line or Nederland Line, was a Dutch shipping line that operated from 1870 until 1970, when it merged with several other companies to form what would become Royal Nedlloyd.The company's motto, Semper Mare Navigandum ("Always sail the seas"), conveniently fitted the same initials.