Roberto Ivens
| Name | Roberto Ivens |
| Type | Navy trawler |
| GRT | 281 tons |
| Country |  Portuguese |
| Built | 1906 |
| Builder | Cochrane & Sons, Ltd., Selby |
| Operator | Portuguese Navy |
| History | Built as Lord Nunburnholme. Peace-time operator: Sociedade de Pescarias a Vapor, Lda., Porto as Lordello. |
U-boat attacks on Navy trawler Roberto Ivens
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 26 Jul 1917 | UC 54 (Heinrich XXXVII Prinz Reuß zu Köstritz) | Sunk | Mined 12 miles south of Cascais | 38° 30'N, 9° 24'W | 14 | ||
Attribution to UC 54 presumed. Source of position: Inso, Jaime, "A Marinha Portuguesa na Grande Guerra", "Anais do Club Militar Naval", 67º Ano, Novembro e Dezembro, Lisboa, 1937, p. 1011. | ||||||||
Position of attack on Roberto Ivens
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