| Displacement | 26t standard, 35t full load |
|---|---|
| Length | 23.0m oa |
| Width | 5.5m |
| Draught | 0.7m |
| Machinery | 2-shaft gasoline, 1600hp |
| Speed | 30kt |
| Complement | 7 |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| ASH-04 | ASH-4 (Kosoku 4-Go) | FY1957 | MHI, Shiomnoseki | 1958.10.10 | 1958.12.11 | 1959. 5.11 | Auxiliary Service boat | (Hachinohe airunit, Ominato district) 1973. 3.31 (Omura airunit, Sasebo district) 1974. 9.30 disc |
| ASH-05 | ASH-5 (Kosoku 5-Go) | FY1958 | MHI, Shiomnoseki | 1958.12.11 | 1959. 3. 2 | 1959. 6.12 | Auxiliary Service boat | (Hakodate station, Ominato district) 1974. 9.30 disc |