| Departure | Convoy | Arrival |
| Halifax, Aug 8, 1940 |
| HX.64 (HALIFAX - Liverpool) |
| Methil Roads, Aug 24, 1940 |
| Methil, Sep 14, 1940 |
| OA.214 (METHIL - DISPERSED) |
| |
| Halifax, Oct 8, 1940 |
| HX.79 (HALIFAX - Liverpool) |
| Sydney CB, Oct 16, 1940 |
| Sydney CB, Oct 24, 1940 |
| SC.9 (SYDNEY CB - LIVERPOOL) |
| Liverpool, Nov 9, 1940 |
| Clyde, Nov 11, 1940 |
| WN.37 (CLYDE - METHIL) |
| Methil, Nov 16, 1940 |
| Methil, Nov 18, 1940 |
| FS.338 (METHIL - SOUTHEND) |
| Immingham, Nov 20, 1940 |
| |
| FN.346 (SOUTHEND - METHIL) |
| Methil, Dec 1, 1940 |
| Methil, Dec 2, 1940 |
| EN.35/1 (METHIL - OBAN) |
| Oban, Dec 6, 1940 |
| Halifax, Feb 18, 1941 |
| SC.23 (HALIFAX - LOCH EWE) |
| Loch Ewe, Mar 9, 1941 |
| |
| WN.97 (CLYDE - METHIL) |
| Methil, Mar 14, 1941 |
| Sunderland, Apr 13, 1941 |
| EC.6 (SOUTHEND - CLYDE) |
| Loch Ewe, Apr 16, 1941 |
| Halifax, May 27, 1941 |
| HX.129 (HALIFAX - Liverpool) |
| Liverpool, Jun 12, 1941 |
| Belfast Lough, Jun 12, 1941 |
| BB.33 (BELFAST LOUGH - M HAVEN) |
| Milford Haven, Jun 13, 1941 |
| Liverpool, Jul 17, 1941 |
| OB.348 (LIVERPOOL - HALIFAX) |
| Halifax, Jul 31, 1941 |
| Halifax, Aug 16, 1941 |
| HX.145 (HALIFAX - Liverpool) |
| Liverpool, Aug 31, 1941 |
| Belfast Lough, Aug 31, 1941 |
| BB.70 (BELFAST LOUGH - M HAVEN) |
| Swansea, Sep 2, 1941 |
| Milford Haven, Sep 12, 1941 |
| ON.16 (LIVERPOOL - DISPERSED) |
| |
| ERNA III was lost in the N. Atlantic on Sep 22, 1941 whilst sailing independently. Cause of loss: U 562. |
|---|---|---|---|---|---|