Alto
| Name | Alto |
| Type | Steamer |
| GRT | 2,266 tons |
| Country |  British |
| Built | 1916 |
| Builder | North of Ireland SB. Co., Ltd., Londonderry |
| Operator | Pelton SS. Co., Ltd., Newcastle |
| History | Arch deck steamer. |
U-boat attacks on Steamer Alto
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 16 Jul 1916 | UC 1 (Kurt Ramien) | Sunk | Mined 4 miles off Kessingland, Suffolk | Rouen - Newcastle | in ballast | 0 |
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