| Name: | CONSTANTIN |
| Type: | Passenger Cargo Ship |
| Launched: | 03/05/1866 |
| Completed: | 07/1866 |
| Builder: | Palmers' Shipbuilding & Iron Co Ltd |
| Yard: | Willington Quay |
| Yard Number: | 202 |
| Dimensions: | 522grt, 329nrt, 210.5 x 29.0 x 12.2ft |
| Engines: | 2cyl (44 & 44 x 54ins), 140hp; (1896: 2 x T3cyl (12, 19 & 32 x 21ins), 94nhp, 600ihp) |
| Engines by: | Thompson & Boyd, Newcastle; (1896: North-Eastern Marine Engineering Co Ltd, Wallsend) |
| Propulsion: | Paddle, 11.0knots; (188x: 2 x Screws) |
| Construction: | Iron |
| Reg Number: | n/a |
| History: | |
| 07/1866 | South Finland Steam Navigation Co, Helsingfors |
| 1877 | Sydfinska Ångfartygs A/B, Helsingfors |
| 1890 | Rigaer Dampfschifffahrts Ges, Riga |
| 1914 | Russian East Asiatic Steam Ship Co Ltd (Baltic Line), Riga |
| 08/1914 | Imperial Russian Navy |
| 12/1916 | Renamed KHOPER |
| 08/1918 | Renamed TRIANGULAYTOR |
| 12/1924 | Broken up |
| Comments: | Accommodation for 110 x 1st Class & unspecified number of 2nd Class passengers |
| 188x: Converted into a twin screw vessel in Sweden | |
| 1897: Damaged by grounding | |
| 1897: Re-engined with engines manufactured in 1896 | |
| 08/1914: Requisitioned by the Imperial Russian Navy as a dispatch boat | |
| 05/1916: Converted into a minelayer | |
| 08/1920: Damaged by grounding on Lake Ladoga | |
| 1922: Converted into a pilotage depot at Kronstadt | |
| LR has engines built by Palmer which indicates they may have been subcontracted to | |
| Thompson & Boyd and installed by Palmers at Jarrow |
Newcastle Daily Chronicle, Monday, 02/07/1866