| Displacement | 490t standard (ASU-81 480t, ASU-85 500t) |
|---|---|
| Length | 52m oa |
| Width | 10m |
| Draught | 2.5m |
| Machinery | 2-shaft diesel, 1600bhp |
| Speed | 14kt |
| Armament | none |
| Sensor | Radar: OPS-10 (ASU-84/85 OPS-19) |
| Complement | 35 (ASU-84/85 25) |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| ASU-81 | ASU-81 (Tokumutei 81-Go) | FY1967 | Sasebo HI | 1967.10. 2 | 1968. 1.18 | 1968. 3.30 | Aux. Service craft (YAS-101) | 1977. 4.18 Auxiliary Service boat(ASU-81) (Kanoya airstation support unit, Sasebo district) 1987. 7. 1 (Sasebo guard, Sasebo district) 1997.10.27 disc |
| ASU-82 | ASU-82 (Tokumutei 82-Go) | FY1968 | Sasebo HI | 1968. 9.25 | 1968.12.20 | 1969. 3.31 | Aux. Service craft (YAS-102) | 1977. 4.18 Auxiliary Service boat(ASU-82) (Hachinohe airstation support unit, Ominato district) 1987. 7. 1 (Ominato guard, Ominato district) 1998. 8.14 disc |
| ASU-83 | ASU-83 (Tokumutei 83-Go) | FY1970 | Sasebo HI | 1971. 4. 2 | 1971. 5.24 | 1971. 9.30 | Aux. Service craft (YAS-103) | 1977. 4.18 Auxiliary Service boat(ASU-83) (Tateyama airstation support unit, Yokosuka district) 1987. 7. 1 (Yokosuka guard, Yokosuka district) 2001. 6.15 disc |
| ASU-84 | ASU-84 (Tokumutei 84-Go) | FY1971 | Usuki IWks | 1972. 2. 4 | 1972. 6.15 | 1972. 9.13 | Aux. Service craft (YAS-104) | 1977. 4.18 Auxiliary Service boat(ASU-84) (Yura base detach, Kure district) 1987. 7. 1 (Saiki base detach, Kure guard, Kure district) 2001. 9.17 disc |
| ASU-85 | ASU-85 (Tokumutei 85-Go) | FY1972 | Usuki IWks | 1973. 2.20 | 1973. 7.16 | 1973. 9.19 | Aux. Service craft (YAS-105) | 1977. 4.18 Auxiliary Service boat(ASU-85) (Chichijima base detach, Yokosuka district) 2002.10.30 disc |