| Displacement | 3650t standard, 4450t full load |
|---|---|
| Length | 113m oa |
| Width | 17.6m |
| Draught | 4.6m |
| Machinery | 2-shaft diesel, 10540bhp |
| Speed | 17kt |
| Armament | 1 DSRV |
| Sensor | Radar: OPS-16 |
| Complement | 120 |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| AS-405 | Chiyoda | FY1981 | Mitsui, Tamano | 1983. 1.19 | 1983.12. 7 | 1985. 3.27 | Submarine Rescue tender | (SFlotilla2, SF, SDF) |