GSI Mariner is a Canadian research/survey ship. She was built and used originally by Geophysical Service Inc. (GSI) to record seismic data on the Mackenzie River delta and the Beaufort Sea in the Arctic Ocean. Later she was owned by other companies, including Halliburton Canada. She is currently beached on the banks of the Mackenzie south of Inuvik, near the beginning of the Tuktoyaktuk Winter Road.