SM U-63 was one of the 329 submarines serving in the Imperial German Navy in World War I.U-63 was engaged in naval warfare and took part in the First Battle of the Atlantic.
| Date | Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 4 July 1916 | HMS Rosemary | 1,250 | Damaged | ||
| 20 August 1916 | 5,250 | Sunk | |||
| 23 October 1916 | Bayreaulx |  United Kingdom | 3,009 | Sunk | |
| 28 October 1916 | Lanao |  United States | 692 | Sunk | |
| 28 October 1916 | Rio Pirahy | United Kingdom | 3,561 | Sunk | |
| 28 October 1916 | Selene | 3,955 | Sunk | ||
| 28 October 1916 | Torsdal |  Norway | 3,621 | Sunk | |
| 29 October 1916 | Massalia |  Greece | 2,186 | Sunk | |
| 29 October 1916 | Meroë | United Kingdom | 3,552 | Sunk | |
| 29 October 1916 | Torino | United Kingdom | 1,850 | Sunk | |
| 31 October 1916 | Delto | Norway | 3,193 | Sunk | |
| 31 October 1916 | Fedelta | 1,906 | Sunk | ||
| 27 November 1916 | Maude Larssen | United Kingdom | 1,222 | Sunk | |
| 28 November 1916 | Sigurd |  Denmark | 2,119 | Sunk | |
| 30 November 1916 | Roma | United Kingdom | 125 | Sunk | |
| 2 December 1916 | Luigi C. | 71 | Sunk | ||
| 2 December 1916 | Roma | 643 | Sunk | ||
| 3 December 1916 | HMS Perugia | 4,348 | Sunk | ||
| 5 December 1916 | Grigorios Anghelatos | Greece | 3,635 | Sunk | |
| 11 December 1916 | Magellan |  France | 6,027 | Sunk | |
| 11 December 1916 | Sinai | France | 4,624 | Sunk | |
| 25 March 1917 | Vellore | United Kingdom | 4,926 | Sunk | |
| 26 March 1917 | L. Rahmanich |  Egypt | 79 | Sunk | |
| 1 April 1917 | Zambesi | United Kingdom | 3,759 | Sunk | |
| 4 April 1917 | Margit | United Kingdom | 2,490 | Sunk | |
| 5 April 1917 | Norway | 4,147 | Sunk | ||
| 5 April 1917 | Kangaroo | United Kingdom | 4,348 | Damaged | |
| 28 April 1917 | Carmelo Padre | 74 | Sunk | ||
| 28 April 1917 | Giuseppe Padre I | 102 | Sunk | ||
| 28 April 1917 | Giuseppina G. | 100 | Sunk | ||
| 28 April 1917 | I Due Fratelli P. | 97 | Sunk | ||
| 28 April 1917 | Karonga | United Kingdom | 4,665 | Sunk | |
| 28 April 1917 | Natale B. | 55 | Sunk | ||
| 28 April 1917 | San Francesco Di Paola | 41 | Sunk | ||
| 3 May 1917 | Washington | United Kingdom | 5,080 | Sunk | |
| 4 May 1917 | Transylvania | United Kingdom | 14,348 | Sunk | |
| 5 May 1917 | Talawa | United Kingdom | 3,834 | Damaged | |
| 7 May 1917 | Crown of Leon | United Kingdom | 3,391 | Damaged | |
| 14 May 1917 | Francesco Raiola | 181 | Sunk | ||
| 14 May 1917 | Volga | United Kingdom | 4,404 | Damaged | |
| 15 May 1917 | Ferrara | 5,660 | Damaged | ||
| 22 June 1917 | Himalaya | France | 5,620 | Sunk | |
| 23 June 1917 | Craonne | France | 777 | Sunk | |
| 23 June 1917 | Kalypso Vergotti | Greece | 2,819 | Sunk | |
| 26 June 1917 | Birdoswald | United Kingdom | 4,013 | Sunk | |
| 27 June 1917 | Tong Hong | United Kingdom | 2,184 | Sunk | |
| 30 June 1917 | Alkelda | 98 | Sunk | ||
| 30 June 1917 | Enrichetta | 3,638 | Sunk | ||
| 1 July 1917 | Marie | France | 118 | Sunk | |
| 2 July 1917 | Argentario | 739 | Sunk | ||
| 3 July 1917 | Immacolatina | 54 | Sunk | ||
| 5 September 1917 | Proletaire | France | 101 | Sunk | |
| 11 September 1917 | Embleton | United Kingdom | 5,377 | Sunk | |
| 12 September 1917 | Reim | Norway | 1,126 | Sunk | |
| 15 September 1917 | Platuria | United States | 3,445 | Sunk | |
| 18 September 1917 | Arendal | United Kingdom | 1,387 | Sunk | |
| 26 September 1917 | Heraklios | Greece | 2,878 | Sunk | |
| 5 November 1917 | Hilda R. | United Kingdom | 136 | Sunk | |
| 5 November 1917 | Kai | Denmark | 1,391 | Sunk | |
| 6 November 1917 | HMS Peveril | 1,459 | Sunk | ||
| 8 November 1917 | HMS Candytuft | 1,290 | Damaged | ||
| 8 November 1917 | Benledi | United Kingdom | 3,931 | Damaged | |
| 9 November 1917 | Ardglamis | United Kingdom | 4,540 | Sunk | |
| 14 November 1917 | Trowbridge | United Kingdom | 3,712 | Sunk | |
| 16 November 1917 | Gasconia | United Kingdom | 3,801 | Sunk | |
| 16 November 1917 | Kyno | United Kingdom | 3,034 | Sunk | |
| 18 November 1917 | Huntsgulf | United Kingdom | 3,185 | Damaged | |
| 20 November 1917 | Commendatore Carlo Bruno | 813 | Sunk | ||
| 21 November 1917 | Mossoul | France | 3,135 | Sunk | |
| 5 January 1918 | Rio Claro | United Kingdom | 3,687 | Sunk | |
| 8 January 1918 | San Guglielmo | 8,145 | Sunk | ||
| 15 January 1918 | Bonanova |  Spain | 933 | Sunk | |
| 18 January 1918 | Maria P. | United Kingdom | 263 | Sunk | |
| 18 January 1918 | Ville De Bordeaux | France | 4,857 | Sunk | |
| 22 January 1918 | Anglo-Canadian | United Kingdom | 4,239 | Sunk | |
| 22 January 1918 | Manchester Spinner | United Kingdom | 4,247 | Sunk | |
| 19 May 1918 | Saxilby | United Kingdom | 3,630 | Damaged | |
| 19 May 1918 | Snowdon | United Kingdom | 3,189 | Sunk | |
| 24 May 1918 | Elysia | United Kingdom | 6,397 | Damaged | |
| 30 May 1918 | Antinous | United Kingdom | 3,682 | Damaged | |
| 30 May 1918 | Asiatic Prince | United Kingdom | 2,887 | Sunk | |
| 30 May 1918 | Aymeric | United Kingdom | 4,363 | Sunk | |
| 11 August 1918 | City of Adelaide | United Kingdom | 8,389 | Sunk | |
| 12 August 1918 | G6 | 213 | Sunk | ||
| 24 August 1918 | Delphinula | United Kingdom | 5,238 | Damaged | |
| 16 October 1918 | War Council | United Kingdom | 5,875 | Sunk |