| Name | S-53 and S-54 |
| Type | Stern Wheel Tugs |
| Year | 1918 |
| GRT | 130 |
| Engines | Steam (paddle) |
| Builder | GOOLE SHIPBUILDING & REPAIRING CO. LTD. |
| At | GOOLE |
| Launch date | Fourth quarter 1917 |
| Yard number | 211 and 212 |
| Owners | War Office |
| History | Intended for Mesopotamia, diverted for use in Egypt and probably reassembled there. |
| Fate |
An 'S' class tug
S56 ARDROSSAN, example of the class