Shotline Diving

Connecting You to the Depths of the Great Lakes

NOAA Releases 3D Models of Grecian and Montana Shipwrecks

The National Oceanic and Atmospheric Administration (NOAA), in collaboration with Thunder Bay National Marine Sanctuary, has released two newly rendered 3D models of historically significant Great Lakes shipwrecks: the steel-hulled bulk freighter Grecian (1891) and the wooden steam freighter Montana (U.S. No. 90501). These immersive models provide divers, researchers, and maritime enthusiasts with an unprecedented…

The National Oceanic and Atmospheric Administration (NOAA), in collaboration with Thunder Bay National Marine Sanctuary, has released two newly rendered 3D models of historically significant Great Lakes shipwrecks: the steel-hulled bulk freighter Grecian (1891) and the wooden steam freighter Montana (U.S. No. 90501). These immersive models provide divers, researchers, and maritime enthusiasts with an unprecedented opportunity to explore the sites virtually while advancing preservation and interpretation.

Grecian (1891)

Built in Cleveland by Globe Iron Works, the Grecian was part of the “fast steel flyer” class of Great Lakes bulk carriers, measuring nearly 300 feet long and built to transport iron ore. On June 7, 1906, she struck a reef near DeTour Village, was later refloated, and sank while under tow on June 15 near Thunder Bay Island. The wreck lies upright in roughly 100 feet of water, with her stern, engine, and much of her steel infrastructure preserved. Divers today can view her three-tier stern, deck gear, and remains of a failed salvage canalon.

View the official Grecian (1891) Wreck Profile on Shotline Diving for full specifications, dive data, and historical references.

Montana (U.S. 90501)

Launched in 1872 in Port Huron, Michigan, the Montana was a large wooden steam screw freighter active for more than four decades. On September 6, 1914, fire broke out onboard near Sulphur Island, Lake Huron. Although all 14 individuals onboard survived, the ship was lost and now rests in two major sections at a depth of 40 feet. Her machinery—engine, boiler, and shaft—remain largely intact and offer excellent interpretive value for both divers and educators.

Full vessel history, site coordinates, and legal protections are available at the Montana (U.S. 90501) Wreck Profile.

Why These Models Matter

3D photogrammetry models like these allow for detailed non-invasive documentation of submerged cultural resources. By releasing these models to the public, NOAA promotes virtual heritage tourism, educational outreach, and informed conservation. Both Grecian and Montana are accessible via Thunder Bay’s mooring buoy system and protected under sanctuary law.

Explore the Models on Sketchfab

Stay tuned as more Great Lakes shipwrecks are digitized and released through NOAA’s open-access initiatives.