| Name: | ROYAL ARCH |
| Launched: | 1862 |
| Completed: | 08/1862 |
| Builder: | Marshall Bros, Willington Quay |
| Yard Number: | |
| Dimensions: | 169grt, 77nrt, 121.2 x 19.8 x 10.8ft; (1869: 53nrt); (1871: 79nrt) |
| Engines: | 2 x SL1cyl (33 x 48ins), 70nhp |
| Engines by: | Marshall Bros, South Shields |
| Propulsion: | Paddle |
| Construction: | Iron |
| Reg Number: | 44711 |
| History: | |
| 28/08/1862 | John & Edward Prendiville (Mersey Original Steam Tug Co); registered at Liverpool |
| 1871 | Renamed KNIGHT OF THE CROSS |
| 1882 | Henry Woodger, Scarborough; registered at Scarborough |
| 1888 | Charles C Duncan, Middlesbrough; registered at Middlesbrough |
| 1893 | JH Andressen Successors, Porto, Portugal; renamed AGUIA |
| 1915 | Admiralty |
| 03/1922 | JH Andressen Successors, Porto, Portugal |
| No later history known | |
| Comments: | 1915: Purchased by The Admiralty & based at Mudros |
| 1920: Portuguese source has her wrecked on the bar of the River Douro at Porto while towing the frigate ATLĀNTICA in February 1920 | |
| 1922: Other report suggests a sale to the French Army |
Above: AGUIA at Porto (Oporto, Portugal). Photo is courtesy of David Asprey