J. N. Madvig
Photo courtesy of Danish Maritime Museum, Elsinore
| Name | J. N. Madvig |
| Type | Steamer |
| GRT | 1,762 tons |
| Country |  Danish |
| Built | 1884 |
| Builder | Helsingørs Jernskibsvft. & Maskinbyg., Helsingør |
| Operator | Dampsk. Selsk. Danmark (P. Brown), Copenhagen |
| History |
U-boat attacks on Steamer J. N. Madvig
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 13 Sep 1916 | UB 18 (Otto Steinbrinck) | Sunk | 54 miles NNW of Paimpol | 49° 20'N, 3° 51'W | Tyne - Civitavecchia | coal | 0 |
| also J. H. MADVIG | ||||||||
Position of attack on J. N. Madvig
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