| Name: | JOHN CLAVELL |
| Type: | Trawler |
| Launched: | 14/08/1919 |
| Completed: | 10/1920 |
| Builder: | Hepples (1919) Ltd |
| Yard: | South Shields |
| Yard Number: | 652 |
| Dimensions: | 276grt, 113nrt, 125.3 x 23.4 x 12.6ft |
| Engines: | T3cyl (12.5, 21 & 35 x 26ins), 62nhp |
| Engines by: | Shields Engineering Co, North Shields |
| Propulsion: | 1 x Screw |
| Construction: | Steel |
| Reg Number: | 145260 |
| History: | |
| 07/07/1921 | The Admiralty, London |
| 1921 | D Tejero Perez, Corunna; renamed DENIS |
| No later history known | |
| Comments: | A Castle Class Naval Trawler, armed with 1 x 12pdr gun |