ELF (Extremely Low Frequency) revisits the ELF Project, a US Navy project consisting of two transmitters located in Northern Wisconsin and Michigan’s Upper Peninsula, which sent one-way coded messages to nuclear submarines around the world. Installed largely against the local population’s wishes, health and environmental concerns, it was operational between 1989 and 2004, when it was decommissioned. This video revisits the project and its site near Republic, Michigan. It is the result of a collaboration with writer Ander Monson.