| Shipyard / Year | Vickers Armstrongs / 1941 | |
| Dead weight | 10,310 | MT |
| Gross register | 7,092 | GRT |
| Length | 136.4 | mtr |
| Breadth | 17.1 | mtr |
| Depth | 7.9 | mtr |
| Propulsion | Reciprocating triple expansion | |
| Power | 2,672 | H.P. |
| Speed | 10 | knots |
| Bought | 1947 | to |
| Owner | British Government | |
| Name | Empire Morn | |
| Sold | 1963 | to |
| Owner | MARCOSA | |
| Name | Rio Pas | |
| Scrapped | Santander - 1973 | |
| Shipyard / Year | Permanent Metals / 1943 | |
| Name | R. F. Peckham | |
| Dead weight | 11,317 | MT |
| Gross register | 7,176 | GRT |
| Length | 139.7 | mtr |
| Breadth | 17.4 | mtr |
| Depth | 8.7 | mtr |
| Propulsion | Reciprocating triple expansion | |
| Power | 2,500 | H.P. |
| Speed | 11 | knots |
| Bought | 1952 | to |
| Owner | USA Government | |
| Name | R. F. Peckham | |
| Sold | 1962 | to |
| Owner | Nicomedes García | |
| Name | Rio Tajo | |
| Owner / Year | MARCOSA / 1967 | |
| Name | Rio Tajo | |
| Owner / Year | Naviera de Cantabria / 1975 | |
| Name | Rio Tajo | |
| Scrapped | Santander - 1976 | |
Spanish version
