| Name: | CASTORE |
| Type: | Gunboat |
| Keel: | 22/02/1887 |
| Launched: | 09/1888 |
| Completed: | 1889 |
| Builder: | Sir WG Armstrong, Mitchell & Co Ltd |
| Yard: | Elswick |
| Yard Number: | 512 |
| Dimensions: | 667disp, 115.0 x 37.0 x 9.2(draft)ft |
| Engines: | 2 x VT3cyl (9.5, 15 & 25 x 18ins), 364ihp |
| Engines by: | Wallsend Slipway & Engineering Co Ltd, Wallsend |
| Propulsion: | 2 x Screws, 8.5knots |
| Construction: | Steel |
| Armament: | 1 x 16.0ins gun |
| History: | |
| 1889 | Italian Ministry of War |
| 08/10/1925 | Stricken |
| Comments: | Shipped to Italy in parts and re-assembled at Pozzuoli nera Naples |
| May have been a test bed for the 16.0ins gun | |
| 1889: Re-armed with a 4.7ins gun | |
| 1899: Disarmed and reclassified as a barge | |
| 1904: Reclassified as a minelayer | |
| 1915: Reclassified as a torpedo testing craft | |
| 08/10/1925: Stricken and discarded |
Photo is of her sister POLLUCE