Lake Guardian

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(PD) Photo: NOAA
The Lake Guardian on Lake Erie.

The Lake Guardian is a research vessel that serves on North America's Great Lakes.[1] She is owned by the United States Environmental Protection Agency.

Lake Guardian specifications[2]
length 180 feet
beam 40 feet
draft 11 feet
gross tonnage 283 tons
displacement 850 tons
home port Bay City, Michigan
constructed 1981
conversion 1988
range 6,000 miles
cruising speed 11 knots
  • 2 x 1,200 hp Caterpillar diesels
  • 1 x 300 hp bow thruster
propellers 2 x 4 blade stainless stell, in Kort nozzles
  • 13 crew
  • 29 passengers


  1. Research Vessel Lake Guardian, Environmental Protection Agency
  2. R/V Lake Guardian: General Specifications, Great Lakes Monitoring