The Coast Guard Cutter Healy returned to its homeport in Seattle Thursday after a 130 days of operations and scientific research in the Bering Sea, Chukchi Sea and Arctic Ocean.
Through the course of the voyage, the 420-foot long polar icebreaker hosted researchers involved in three separate scientific missions.
Stanford University scientists used plankton and zooplankton nets, weather balloons and other equipment to collect information on the Chukchi ecosystem, according to the Coast Guard.
Woods Hole Oceanographic Institution scientists studied the Pacific Boundary Current and other ocean trends in the Arctic.
In a final mission, the Coast Guard Research and Development Center evaluated technologies, including drones, that could be used for monitoring oil spills if they occurred in the Arctic.