Madrugada
| Name | Madrugada |
| Type | Auxiliary motor
|
| GRT | 1,613 tons |
| Country |  American |
| Built | 1917
|
| Builder | McEachern Ship Co., Astoria, OR
|
| Operator | Gravenhorst & Co., New York
|
| History | Wooden 4-masted schooner with an auxiliary engine.
|
U-boat attacks on Auxiliary motor Madrugada
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 15 Aug 1918 | U 117 (Otto Dröscher) | Sunk | 35 miles off Norfolk
| 37° 50'N, 74° 55'W
| New York - Santos
|
| 0
|
Position of attack on Madrugada
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