Columbian
| Name | Columbian |
| Type | Steamer
|
| GRT | 8,580 tons |
| Country |  American |
| Built | 1907
|
| Builder | Union Iron Works Co., San Francisco
|
| Operator | American-Hawaiian SS. Co., Inc., New York
|
| History |
|
U-boat attacks on Steamer Columbian
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 8 Nov 1916 | U 49 (Richard Hartmann) | Sunk | 50 miles northwest of Cape Ortegal
| 44° 18'N, 9° 20'W
| New York & Boston via St. Nazaire - Genoa
| steel plate and general cargo
| 0
|
Position of attack on Columbian
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