Calgarian
| Name | Calgarian |
| Type | Armed merchant cruiser |
| GRT | 12,515 tons (one of the largest ships hit) |
| Country |  British |
| Built | 1914 |
| Builder | Fairfield Ship Building and Engineering, Glasgow |
| Operator | Royal Navy |
| History | She was taken over on 15 September 1914 and became an armed merchant cruiser. Peace-time operator: Allan Line SS. Co., Ltd. (Canadian Pacific Ocean Services, Ltd.), Glasgow |
U-boat attacks on Armed merchant cruiser Calgarian
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 Mar 1918 | U 19 (Johannes Spieß) | Sunk | off Rathlin Island | 55° 25'N, 6° 15'W | 49 | ||
Hit by three torpedoes in the North Channel. Calgarian had sailed from Halifax with convoy HS29 on 15 February 1918. She had left the convoy escorted by Beagle and Moresby and was in sight of convoy OB50 when hit. Rosemary was detached from the escort of OB50 to take Calgarian in tow, but the hawsers parted. Anchusa, also from OB50, was ordered to take over but she sighted U19’s periscope and carried out a depth charge attack.Rosemary and Anchusa were ordered to rejoin OB50. | ||||||||
Position of attack on Calgarian
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