Celtic
| Name | Celtic |
| Type | Passenger steamer |
| GRT | 20,904 tons (one of the largest ships hit) |
| Country |  British |
| Built | 1901 |
| Builder | Harland & Wolff, Ltd., Belfast |
| Operator | Oceanic Steam Navigation Co., Ltd., Liverpool |
| History |
U-boat attacks on Passenger steamer Celtic
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Feb 1917 | U 80 (Alfred von Glasenapp) | Damaged | Mined S of the Isle of Man (barr.14) - Damaged but reached Liverpool | 53.57N, 04.40W | Liverpool - New York | 0 | |
| 2 | 31 Mar 1918 | UB 77 (Wilhelm Meyer) | Damaged | 11 miles S of Isle of Man | Liverpool - New York | mails | 6 | |
| Torpedoed, beached and later salvaged | ||||||||
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