| Name: | BROCK |
| Launched: | 01/11/1883 |
| Completed: | 1883 |
| Builder: | Thomas B Seath & Co, Rutherglen |
| Yard Number: | 236 |
| Dimensions: | 122grt, 9nrt, 95.2 x 19.1 x 9.0ft; (1890: 141grt, 15nrt) |
| Engines: | 2 x 2cyl (18 & 34 x 24ins), 500ihp |
| Engines By: | Rankin & Blackmore Ltd, Greenock |
| Propulsion: | 2 x Screws |
| Construction: | Iron |
| Reg Number: | 89701 |
| History: | |
| 1883 | Lancashire & Yorkshire and London & North Western Railway Companies, registered at Fleetwood |
| 1902 | GEJ Moody, Cleethorpes |
| 10/1903 | Lawson Steam Tug-boat Co Ltd |
| 1904 | Registered at South Shields; renamed MENTOR |
| 06/1920 | Transferred to Lawson-Batey Tugs Ltd |
| 03/1937 | VA Cappon Tugs Ltd; registered at Dundee |
| 03/1940 | Transferred to Dundee, Perth & London Shipping Co Ltd |
| 07/1946 | Broken up |
| Comments: | 03/1937: Cost £570 |
| 07/1946: Broken up at Ghent, Belgium |
Above photo as MENTOR courtesy of Eddie Frost