| Departure | Convoy | Arrival |
| Milford Haven, Oct 26, 1939 |
| OB.25 (LIVERPOOL - DISPERSED) |
| |
| Freetown, Jan 16, 1940 |
| SL.17 (FREETOWN - LIVERPOOL) |
| Havre, Feb 3, 1940 |
| Liverpool, Mar 3, 1940 |
| OB.103 (LIVERPOOL - FORMED OG 21F) |
| |
| |
| OG.21F (FORMED AT SEA - GIBRALTAR) |
| Gibraltar, Mar 11, 1940 |
| Freetown, May 1, 1940 |
| SL.30 (FREETOWN - LIVERPOOL) |
| Liverpool, May 18, 1940 |
| Milford Haven, Jun 6, 1940 |
| OB.162 (LIVERPOOL - DISPERSED) |
| |
| Freetown, Aug 11, 1940 |
| SL.43 (FREETOWN - LIVERPOOL) |
| Methil Roads, Aug 31, 1940 |
| Methil, Sep 4, 1940 |
| FS.272 (METHIL - SOUTHEND) |
| Southend, Sep 6, 1940 |
| Southend, Sep 22, 1940 |
| FN.288 (SOUTHEND - METHIL) |
| Tyne, Sep 24, 1940 |
| Methil, Oct 6, 1940 |
| OA.225 (METHIL - DISPERSED) |
| |
| Freetown, Dec 7, 1940 |
| SL.58 (FREETOWN - LIVERPOOL) |
| Liverpool, Dec 28, 1940 |
| Clyde, Jan 24, 1941 |
| OB.277 (LIVERPOOL - DISPERSED) |
| |
| Freetown, Mar 29, 1941 |
| SL.70 (FREETOWN - LIVERPOOL) |
| Liverpool, Apr 23, 1941 |
| Liverpool, May 12, 1941 |
| OB.322 (LIVERPOOL - DISPERSED) |
| |
| MARCONI was lost in the N. Atlantic on May 21, 1941 whilst sailing independently. Cause of loss: U 109. |
|---|---|---|---|---|---|