1. Innerspace Scuba Center 32 N 21st Ave W, Duluth, MN 55806 Coordinate: 46.76766,-92.1248 Phone: (218) 726-1010
2. Great Lakes Diving & Salvage 716 Garfield Ave, Duluth, MN 55802 Coordinate: 46.75956,-92.10875 Phone: (989) 731-3483