Marine Industries Ltd.
IndustryShipbuilding, Rail car manufacturing, Hydro-Electric Generators and Turbines
FateMerged and then closed
SuccessorMIL-Davie Shipbuilding
  • Cargo liners
  • Coastal tankers
  • Fishing vessels
  • Research vessels
  • Ferries
  • Naval vessels
  • Icebreakers
  • Railroad cars
  • Hydro generators and turbines
Number of employees
c. 8,500

Marine Industries Limited (MIL) was a Canadian ship building, hydro-electric and rail car manufacturing company, in Sorel-Tracy, Quebec, with a shipyard located on the Richelieu river about 1 km from the St. Lawrence River. It employed up to 8,500 people during the World War II support effort.

Opened in 1937 by the Simard family after taking over the smaller Manseau Shipyard, the yards early contracts were tugs and coastal tankers used on the Great Lakes and Canada's Atlantic coast. In the 1940s, MIL built 11 British Corvettes, beginning a growth as one of the most significant exporter of ships in Canada's shipbuilding history, with exports to Britain, France, USA, Venezuela, Greece, Holland, Indonesia, Cuba and Poland. This required a major modernisation of the yard in the early 1960s plus the growth of a significant in-house design capacity to create what became known as MARINDUS designs, from which 45 ships were built of 9 unique designs for coasters, fishing vessels, tankers and cargo liners. MIL also began building railroad cars in 1957, with production focused mainly on flat cars, gondolas and covered hoppers for the domestic and export markets and then opened a Hydro-Electric Division in the 1960s that designed and built generators and turbines for numerous projects in Quebec (Churchill Falls, Outardes, Manicouagan, La Grande etc.) with smaller ones in Ecuador and India.

In 1986 the federal government asked Quebec to rationalize its shipyards, which saw MIL merge with Davie Shipbuilding[1] in Lauzon; the Sorel shipyard was called M.I.L. Tracy (for Tracy, Quebec) and the Lauzon shipyard was called M.I.L. Lauzon.

Not long after the merger, the new company MIL Davie Shipbuilding closed the Sorel shipyard (in 1988) along with the Versatile Vickers shipyard in Montreal, resulting in a total loss of 1,700 jobs. The shipyard buildings were demolished, drydock still visible and Structure D'Acier DMR Incorporated now operating at the site.

Ships built

Starting with the largest marine railway in North American in the early 1900s, MIL went on to build numerous key vessels to earn a special place in Canada's shipbuilding history, by building Canada's first all-welded steel ship (1935), Canada's first all-welded aluminum boats in 1950, 13 Liberty-style ships a year during the war effort (1941-3), largest diesel-electric icebreaking railcar ferry (Abegweit 1947), the first icebreaker to sail through the NW Passage both ways (Labrador 1954), the record-breaking all aluminum Bras d'Or Hydrofoil hull (for DeHaviland 1967) and the then largest floating crane in N.America (1961) plus several record breaking fishing boats and the extensive MARINDUS series (noted above) for export. The Sorel shipyard was also responsible for numerous Royal Canadian Navy, Canadian Coast Guard and CN Marine vessels as well as some 300 commercial ships of over 50 different types. Of these, only ships built for various Canadian Government services are listed below.



Coast Guard vessels


Floating dry dock


  1. ^ Davie George T. & Sons Shipbuilding & Repairing Co. Wrecksite. Retrieved 24 November 2022
  2. ^ Macpherson, Ken; Milner, Marc (1993). Corvettes of the Royal Canadian Navy 1939-1945. St. Catharines, Ont.: Vanwell Publishing Ltd. ISBN 0-920277-83-7.
  3. ^ "Howe Sound Queen". 30 January 2008. Retrieved 22 October 2016.
  4. ^ "ERG". MarineTraffic. Retrieved 22 October 2016.