| Name: | HARFAT CASTLE |
| Type: | Fishing Vessel |
| Launched: | 06/08/1902 |
| Completed: | 09/1902 |
| Builder: | Smith's Dock Co Ltd |
| Yard: | North Shields |
| Yard Number: | 697 |
| Dimensions: | 192grt, 49nrt, 110.0 x 21.0 x 11.0ft |
| Engines: | T3cyl (12, 19 & 32 x 22.5ins), 48nhp |
| Engines by: | North-Eastern Marine Engineering Co Ltd, Sunderland |
| Propulsion: | 1 x Screw |
| Construction: | Steel |
| Reg Number: | 114520 |
| History: | |
| 09/1902 | Castle Steam Trawlers Ltd (C Heron), London |
| 1906 | Harley & Miller, Liverpool; renamed GADWALL |
| 25/07/1915 | Sank |
| Comments: | 1902: Allocated fishing registration number LO172 at London |
| 1906: Allocated fishing registration number LL83 at Liverpool | |
| 25/07/1915: Sunk by U-Boat U41, 6 miles west of Sumburgh Head |