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Subclass TC
| TC1-978 | Hydraulic engineering | |
| TC160-181 | Technical hydraulics | |
| TC183-201 | General preliminary operations. Dredging. Submarine building | |
| TC203-380 | Harbors and coast protective works. Coastal engineering. Lighthouses | |
| TC401-506 | River, lake, and water-supply engineering (General) | |
| TC530-537 | River protective works. Regulation. Flood control | |
| TC540-558 | Dams. Barrages | |
| TC601-791 | Canals and inland navigation. Waterways | |
| TC801-978 | Irrigation engineering. Reclamation of wasteland. Drainage | |
| TC1501-1800 | Ocean engineering | |
