| Name: | NO 21 |
| Type: | Hopper Barge |
| Launched: | 20/03/1862 |
| Completed: | 1862 |
| Builder: | River Tyne Commissioners |
| Yard: | Howdon |
| Yard Number: | |
| Dimensions: | 310tonsb, 80.0 x 28.0 x ?ft |
| Engines: | None |
| Engines by: | n/a |
| Propulsion: | None |
| Construction: | |
| Reg Number: | n/a |
| History: | |
| 1862 | River Tyne Commissioners, Howdon |
| No later history known | |
| Comments: | Designed to be a self discharging hopper |
| Length 84.0ft overall |