Minesweepers (CD, TR) Built During WWI (or Earlier)

Most recent update: November 7, 2021.
Until recently, almost all Canadian construction of minesweepers was focused on the needs of WWI and WWII, when the RCN functioned as a part of the RN.  As a result, many of these boats were built for the RN, and some for allied nations.  Many designs were essentially fishing vessel designs, in the expectation that that would be what they became when the war was over.  If anyone has any corrections or additions to this table, please send them to timcolton@aol.com
Shipbuilder Location Hull # Original Name Built for CN Type # Tons Ft. Completed Disposition
Constance Class Minesweepers (ex-Fisheries Protection Cruisers)
Polson IW Owen Sound ON 30 Constance RCN       185   1891 Acquired from CCG 1914, sold 1920
Polson IW Owen Sound ON 31 Curlew RCN       185   1892 Acquired from CCG 1914, sold 1921
Polson IW Owen Sound ON 32 Petrel RCN       185   1892 Acquired from CCG 1914, sold 1923
Battle Class Trawlers
Polson IW Toronto ON 135 Festubert RCN       320   13-Nov-17 Later Inverleigh 1947, scuttled 1971
Polson IW Toronto ON 136 Ypres RCN       320   10-Nov-17 In collision and sank 1940
Polson IW Toronto ON 137 Messines RCN       320   13-Nov-17 Later Lightship No. 3 1920, scrapped 1962
Polson IW Toronto ON 138 St. Eloi RCN       320   13-Nov-17 Later Lightship No. 20 1920, scrapped 1962
Polson IW Toronto ON 139 St. Julien RCN       320   13-Nov-17 Later Lightship No. 21 1920, Centennial 1958, active
Polson IW Toronto ON 140 Vimy RCN       320   13-Nov-17 Later Lightship No. 22 1920, scrapped 1958
Canadian Vickers Montreal QC 21 Armentieres RCN       357   17-Jun-18 Later A. G. Garrish 1947, Arctic Rover 1958, La Force 1962, Polaris 1973, La Force
Canadian Vickers Montreal QC 22 Arleux RCN       357   5-Jun-18 Destroyed by an explosion off Halifax NS, 1948
Canadian Vickers Montreal QC 23 Arras RCN       357   8-Jul-18 Scrapped 1957
Canadian Vickers Montreal QC 24 Givenchy RCN       357   22-Jun-18 Scrapped 1952
Kingston SB Kingston ON 25/7 Thiepval RCN       357   24-Jul-18 Sub from Vickers, scrapped 1950
Kingston SB Kingston ON 26/8 Loos RCN       357   1-Aug-18 Sub from Vickers, wrecked Barclay Sound 1930
Canadian Drifters (CD)    
Davie Shipbuilding Lauzon QC 358   RCN   CD 1 99 84 4-Sep-17 Later Ebbtide 1924, sold 1946
Davie Shipbuilding Lauzon QC 359   RCN   CD 2 99 84 16-Oct-17 Later Westby 1922
Davie Shipbuilding Lauzon QC 360   RCN   CD 3 99 84 29-Sep-17 Later Corcovado 1921
Davie Shipbuilding Lauzon QC 361   RCN   CD 4 99 84 3-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 362   RCN   CD 5 99 84 11-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 363   RCN   CD 6 99 84 8-Oct-17 Later Bay Queen 1921, foundered oiff Nova Scotia 1925
Davie Shipbuilding Lauzon QC 364   RCN   CD 7 99 84 15-Oct-17 Later Utterby 1922
Davie Shipbuilding Lauzon QC 365   RCN   CD 8 99 84 16-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 366   RCN   CD 9 99 84 17-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 367   RCN   CD 10 99 84 20-Oct-17 Scrapped 1922
Davie Shipbuilding Lauzon QC 368   RCN   CD 11 99 84 22-Oct-17 Later Rauceby 1922, Pontoise 1925
Davie Shipbuilding Lauzon QC 369   RCN   CD 12 99 84 23-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 370   RCN   CD 13 99 84 29-Oct-17 Later Ewerby 1923, Locqueltas 1925
Davie Shipbuilding Lauzon QC 371   RCN   CD 14 99 84 30-Oct-17 Later Gilby 1922
Davie Shipbuilding Lauzon QC 372   RCN   CD 15 99 84 31-Oct-17 Later Bretonia 1922
Davie Shipbuilding Lauzon QC 373   RCN   CD 16 99 84 31-Oct-17 Sold 1922
Davie Shipbuilding Lauzon QC 374   RCN   CD 17 99 84 8-Nov-17 Later Stansgate 1925
Davie Shipbuilding Lauzon QC 375   RCN   CD 18 99 84 7-Nov-17 Scrapped 1922
Davie Shipbuilding Lauzon QC 376   RCN   CD 19 99 84 10-Nov-17 Scrapped 1922
Davie Shipbuilding Lauzon QC 377   RCN   CD 20 99 84 10-Nov-17 Later Guelph 1918
Davie Shipbuilding Lauzon QC 378   RCN   CD 21 99 84 6-Sep-17 Scrapped 1922
Davie Shipbuilding Lauzon QC 379   RCN   CD 22 99 84 12-Nov-17 Later Gunby 1922
Davie Shipbuilding Lauzon QC 380   RCN   CD 23 99 84 14-Nov-17 Later Blairmore I 1924
Davie Shipbuilding Lauzon QC 381   RCN   CD 24 99 84 17-Nov-17 Later Daron 1924, scrapped 1924
Davie Shipbuilding Lauzon QC 382   RCN   CD 25 99 84 17-Nov-17 Later Fenby 1923
Davie Shipbuilding Lauzon QC 383   RCN   CD 26 99 84 19-Nov-17 Later Moon 1924, foundered 1927
Davie Shipbuilding Lauzon QC 384   RCN   CD 27 99 84 19-Nov-17 Later Wop 1921
Davie Shipbuilding Lauzon QC 385   RCN   CD 28 99 84 21-Nov-17 Later Graby 1922, Massabielle 1923
Davie Shipbuilding Lauzon QC 386   RCN   CD 29 99 84 21-Nov-17 Sold 1922
Davie Shipbuilding Lauzon QC 387   RCN   CD 30 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 388   RCN   CD 31 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 389   RCN   CD 32 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 390   RCN   CD 33 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 391   RCN   CD 34 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 392   RCN   CD 35 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 393   RCN   CD 36 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 394   RCN   CD 37 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 395   RCN   CD 38 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 396   RCN   CD 39 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 397   RCN   CD 40 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 398   RCN   CD 41 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 399   RCN   CD 42 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 400   RCN   CD 43 99 84 Sep-18 Lost 1921
Davie Shipbuilding Lauzon QC 401   RCN   CD 44 99 84 Sep-18 Sold 1922
Davie Shipbuilding Lauzon QC 402   RCN   CD 45 99 84 Aug-18 Sold 1922
Davie Shipbuilding Lauzon QC 403   RCN   CD 46 99 84 Jul-18 Sold 1922
Davie Shipbuilding Lauzon QC 404   RCN   CD 47 99 84 Sep-18 Sold 1922
Davie Shipbuilding Lauzon QC 405   RCN   CD 48 99 84 Jun-18 Sold 1922
Davie Shipbuilding Lauzon QC 406   RCN   CD 49 99 84 Jun-18 Sold 1922
Davie Shipbuilding Lauzon QC 407   RCN   CD 50 99 84 Jul-18 Sold 1922
Government SY Sorel QC     RCN   CD 51 99 84 1917  
Government SY Sorel QC     RCN   CD 52 99 84 1917  
Government SY Sorel QC     RCN   CD 53 99 84 12-Nov-17 Later Karrier 1922
Sorel Shipbuilding Sorel QC     RCN   CD 54 99 84   Sunk 1920
Sorel Shipbuilding Sorel QC     RCN   CD 55 99 84    
Sorel Shipbuilding Sorel QC     RCN   CD 56 99 84    
Sorel Shipbuilding Sorel QC     RCN   CD 57 99 84   Sunk 1922
Sorel Shipbuilding Sorel QC     RCN   CD 58 99 84 14-Oct-18 Sold 1920 as Mary Curie
Sorel Shipbuilding Sorel QC     RCN   CD 59 99 84 14-Oct-18 Sold 1920 as Two Roses
Sheppard & Sons Sorel QC     RCN   CD 60 99 84 14-Oct-18  
Sheppard & Sons Sorel QC     RCN   CD 61 99 84 14-Oct-18 Sold 1919
LeClaire & Sons Sorel QC     RCN   CD 62 99 84    
LeClaire & Sons Sorel QC     RCN   CD 63 99 84    
LeClaire & Sons Sorel QC     RCN   CD 64 99 84    
LeClaire & Sons Sorel QC     RCN   CD 65 99 84 28-Aug-18 Sold 1920 as Metak
LeClaire & Sons Sorel QC     RCN   CD 66 99 84    
LeClaire & Sons Sorel QC     RCN   CD 67 99 84 14-Oct-18 Sold 1919
Sheppard & Sons Sorel QC     RCN   CD 68 99 84 12-Nov-17  
Sheppard & Sons Sorel QC     RCN   CD 69 99 84 20-Oct-17 Sold as Ewerby, later Aline, scrapped 1929
Sheppard & Sons Sorel QC     RCN   CD 70 99 84    
Canadian Vickers Montreal QC 27   RCN   CD 71 99 84 22-Oct-17 Later Eventide 1923, scrapped 1925
Canadian Vickers Montreal QC 28   RCN   CD 72 99 84 23-Oct-17 Later Floodtide 1923, scrapped 1925
Canadian Vickers Montreal QC 29   RCN   CD 73 99 84 5-Nov-17 Later Clixby 1923, Foi 1925
Canadian Vickers Montreal QC 30   RCN   CD 74 99 84 17-Oct-17 Later Seagull 1921
Canadian Vickers Montreal QC 31   RCN   CD 75 99 84 19-Oct-17 Sold 1922
Canadian Vickers Montreal QC 32   RCN   CD 76 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 33   RCN   CD 77 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 34   RCN   CD 78 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 35   RCN   CD 79 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 36   RCN   CD 80 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 37   RCN   CD 81 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 38   RCN   CD 82 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 39   RCN   CD 83 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 40   RCN   CD 84 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 41   RCN   CD 85 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 42   RCN   CD 86 99 84 1918 Lost 1920
Canadian Vickers Montreal QC 43   RCN   CD 87 99 84 1918 Foundered in the North Atlantic 1920
Canadian Vickers Montreal QC 44   RCN   CD 88 99 84 1918 Lost 1920
Canadian Vickers Montreal QC 45   RCN   CD 89 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 46   RCN   CD 90 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 47   RCN   CD 91 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 48   RCN   CD 92 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 49   RCN   CD 93 99 84 1918 Lost 1920
Canadian Vickers Montreal QC 50   RCN   CD 94 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 51   RCN   CD 95 99 84 1918 Sold 1922
Canadian Vickers Montreal QC 52   RCN   CD 96 99 84 1918 Sold 1922
        RCN   CD 97 99 84 1918 Sold 1922
        RCN   CD 98 99 84 1918 Sold 1922
        RCN   CD 99 99 84 1918 Sold 1922
        RCN   CD 100 99 84 1918 Sold 1922
Modified Castle Class Trawlers
Port Arthur Shipbuilding Port Arthur ON 22   RCN   TR 1 275 125 31-Oct-17 To New Zealand 1925 as Wakakura (T-00), scrapped 1953
Port Arthur Shipbuilding Port Arthur ON 23   RCN   TR 2 275 125 11-Nov-17 To Mexico 1920 as Cobarribas
Port Arthur Shipbuilding Port Arthur ON 24   RCN   TR 3 275 125 17-Nov-17 To Mexico 1920 as Guaymas
Port Arthur Shipbuilding Port Arthur ON 25   RCN   TR 4 275 125 27-Nov-17 To Mexico 1926 as Cartagena
Port Arthur Shipbuilding Port Arthur ON 26   RCN   TR 5 275 125 4-May-18 Later Commandante Loretti 1919
Port Arthur Shipbuilding Port Arthur ON 27   RCN   TR 6 275 125 4-May-18 To Mexico 1920 as Mazatlan
Collingwood Shipbuilding Collingwood ON 53   RCN   TR 7 275 125 27-May-18 Later Santander 1926
Collingwood Shipbuilding Collingwood ON 54   RCN   TR 8 275 125 26-Jun-18 Sold 1920 as Bonthorpe, to RAN 1940, sold 1945, wrecked 1959
Collingwood Shipbuilding Collingwood ON 55   RCN   TR 9 275 125 16-May-18 Later Somersby 1920
Collingwood Shipbuilding Collingwood ON 56   RCN   TR 10 275 125 16-May-18 Later Vera Cruz 1920
Collingwood Shipbuilding Collingwood ON 57   RCN   TR 11 275 125 28-Jun-18 Later San Sebastian 1926
Collingwood Shipbuilding Collingwood ON 58   RCN   TR 12 275 125 25-Aug-18 Sold 1920
Thor Iron Works Toronto ON 6   RCN   TR 13 275 125 25-Aug-18 Transferred from Collingwood
Thor Iron Works Toronto ON 7   RCN   TR 14 275 125 31-Aug-18 Transferred from Collingwood
Polson Iron Works Toronto ON 141   RCN   TR 15 275 125 1918 Sold 1920 as Jacqueline, captured 1940, designated M-3630, later M-3830, sunk by bombing 1943 but salvaged
Polson Iron Works Toronto ON 142   RCN   TR 16 275 125 1918 To Mexico 1920 as Salinas, later Acapulco
Polson Iron Works Toronto ON 143   RCN   TR 17 275 125 1918 Later Jeanne 1920
Polson Iron Works Toronto ON 144   RCN   TR 18 275 125 1918 Later Marie Louise 1921
Kingston Shipbuilding Kingston ON 9   RCN   TR 19 275 125 Aug-18 Later Almeria 1920, Goolgwai 1926, to RAN 1939, returned to owners 1945, wrecked 1955
Kingston Shipbuilding Kingston ON 10   RCN   TR 20 275 125 Aug-18 Later Seville 1920, Durraween 1926, to RAN 1940, returned to owners 1946, scrapped 1952
Canadian Vickers Montreal QC 53   RCN   TR 21 275 125 31-May-18 Later Sacip 1921
Canadian Vickers Montreal QC 54   RCN   TR 22 275 125 21-May-18 Later Marie Evelynne 1920
Canadian Vickers Montreal QC 55   RCN   TR 23 275 125 1-Aug-18 Later Fontenay 1926
Canadian Vickers Montreal QC 56   RCN   TR 24 275 125 16-Nov-17 Later Gosse 1920
Canadian Vickers Montreal QC 57   RCN   TR 25 275 125 1-Jun-18 Later Yvonne Claude 1920
Canadian Vickers Montreal QC 58   RCN   TR 26 275 125 22-May-18 Sold 1920
Canadian Vickers Montreal QC 59   RCN   TR 27 275 125 17-May-18 Later Galopin 1920, captured 1940, designated M-4403, scuttled by gunfire 1944
Canadian Vickers Montreal QC 60   RCN   TR 28 275 125 30-May-18 Later Wellvale 1926
Canadian Vickers Montreal QC 61   RCN   TR 29 275 125 30-May-18 Later Fernando de C. 1920
Canadian Vickers Montreal QC 62   RCN   TR 30 275 125 28-May-18 Later Blanca de C. 1920, Teruca 1963, scrapped 1987
Canadian Vickers Montreal QC 63   RCN   TR 31 275 125 20-May-18 Later Jose Ignacio de C. 1920
Government SY Sorel QC     RCN   TR 32 275 125 1918 Later Authorpe 1926
Government SY Sorel QC     RCN   TR 33 275 125 1918 Later Windroos 1927, then Freddy, sunk 1940 but raised, designated M-3230, sunk by mine 1944
Government SY Sorel QC     RCN   TR 34 275 125 1918 Later Valentia 1919, Etoile du Nord 1928, mined off Dunkirk 1940
Davie Shipbuilding Lauzon QC 408   RCN   TR 35 275 125 5-Jun-18 Later Tampico 1920
Davie Shipbuilding Lauzon QC 409   RCN   TR 36 275 125 5-Jun-18 Later Ferrol 1926
Port Arthur Shipbuilding Port Arthur ON 31   RCN   TR 37 275 125 6-Aug-18 Later Their Merit 1925
Port Arthur Shipbuilding Port Arthur ON 32   RCN   TR 38 275 125 20-Aug-18 Later Alcatraz 1920
Port Arthur Shipbuilding Port Arthur ON 33   RCN   TR 39 275 125 1-Oct-18 Later Chandbali 1930, scrapped 1990
Port Arthur Shipbuilding Port Arthur ON 34   RCN   TR 40 275 125 6-Oct-18 Later Marie Yette 1921, in collision in the River Gironde and lost 1940
Port Arthur Shipbuilding Port Arthur ON 35   RCN   TR 41 275 125 5-May-19 Later Marie Simone 1920, captured 1940, designated V-729, sunk by gunfire 1944
Port Arthur Shipbuilding Port Arthur ON 36   RCN   TR 42 275 125 5-May-19 Later Marie Gilberte 1920
Port Arthur Shipbuilding Port Arthur ON 37   RCN   TR 43 275 125 12-May-19 Later Marie Anne 1920, captured 1940, designated M 4405, sunk by bombing 1944
Port Arthur Shipbuilding Port Arthur ON 38   RCN   TR 44 275 125 12-May-19 Later Florencia 1920
Davie Shipbuilding Lauzon QC 440   RCN   TR 45 275 125 12-May-19 Later Labrador 1919, Mardep 1930, Bernier 1935, wrecked Labrador 1965
Davie Shipbuilding Lauzon QC 441   RCN   TR 46 275 125 12-May-19 Later Algoa Bay 1926
Davie Shipbuilding Lauzon QC 442   RCN   TR 47 275 125 12-May-19 Later Heron 1919
Davie Shipbuilding Lauzon QC 443   RCN   TR 48 275 125 12-May-19 Later Dragon Vert 1919, Miquelon, Korab IV, captured 1940, designated M-3230, sunk by mine 1944
Davie Shipbuilding Lauzon QC 444   RCN   TR 49 275 125 12-May-19 Later Joselle 1919, captured 1940, designated M-4202, scuttled by crew 1944
Davie Shipbuilding Lauzon QC 445   RCN   TR 50 275 125 12-May-19 Later Colonel Rockwell 1920
Government SY Sorel QC     RCN   TR 51 275 125 1918 Later Marie Caroline 1919
Government SY Sorel QC     RCN   TR 52 275 125 1918 Later Marie-Mad 1919, mined off Ajaccio 1943
Government SY Sorel QC     RCN   TR 53 275 125 1918 Later Marie Therese II 1920, captured 1940, designated M-4204, sunk by bombing 1944
Kingston Shipbuilding Kingston ON 11   RCN   TR 54 275 125 Sep-18 Later Table Bay 1925, Mary Mortimer 1937, fate unknown
Kingston Shipbuilding Kingston ON 12   RCN   TR 55 275 125 Nov-18 Later Marie Jacqueline 1920, Svalbard 2 1947/48, captured 1940, designated NN-02, surrendered 1945, re-sold
Kingston Shipbuilding Kingston ON 13   RCN   TR 56 275 125 Nov-18 Later Romanita 1921, fate unknown
Kingston Shipbuilding Kingston ON 14   RCN   TR 57 275 125 May-18 Later Colonel Roosevelt 1920, Texas 1926, to RN 1941, lost in collision off Jamaica 1944
Tidewater Shipbuilding Trois Rivieres QC 1   RCN   TR 58 275 125 Nov-18 Wrecked Barra Sound 1920
Tidewater Shipbuilding Trois Rivieres QC 2   RCN   TR 59 275 125 Nov-18 Later Gironde I 1920, captured 1940, designated FB-07, then V-1517, then M-3854, surrendered 1945, re-sold
Tidewater Shipbuilding Trois Rivieres QC 3   RCN   TR 60 275 125 Nov-18 Later David Haigh 1919