In his book "Red Arctic", John McCannon explains how Dalstroy initially relied on Glavsevmorput or GUSMP (Russian acronym for Main Administration of the Northern Sea Route, a Soviet agency for exploiting resources across the far north) for coordination of supplies and transport. Glavsevmorput managed railway traffic to Vladivostok and shipping from there to Magadan. Over the years, however, as Dalstroy grew more powerful, its director Eduard Berzin obtained ships of his own so as to have more freedom of action. By 1938 Glavsevmorput had lost much of its political support, leaving Dalstroy firmly in control.