Lai
| Name | Lai |
| Type | Auxiliary motor |
| GRT | 509 tons |
| Country |  Norwegian |
| Built | 1912 |
| Builder | Job Bros., St. John’s, Newfoundland |
| Operator | Mohn, Christiania |
| History | Three-masted schooner with an auxiliary motor. |
U-boat attacks on Auxiliary motor Lai
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 13 Jul 1917 | UC 55 (Horst Rühle von Lilienstern) | Sunk | 40 miles W of Egersund or 65 miles WSW of Lindesnes | Shields - Christiania | coal | 0 |
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