| Target strength (dB) | Depth (m) | |||
|---|---|---|---|---|
| 1–5 | 6–10 | 11–15 | 16–20 | |
| −55 | 4 | 8 | 0 | 0 |
| −54 | 22 | 4 | 0 | 0 |
| −53 | 37 | 17 | 0 | 0 |
| −52 | 19 | 17 | 0 | 0 |
| −51 | 11 | 17 | 0 | 0 |
| −50 | 0 | 13 | 0 | 0 |
| −49 | 7 | 8 | 9 | 0 |
| −48 | 0 | 0 | 0 | 0 |
| −47 | 0 | 4 | 0 | 0 |
| −46 | 0 | 4 | 0 | 0 |
| −45 | 0 | 8 | 21 | 15 |
| −44 | 0 | 0 | 14 | 43 |
| −43 | 0 | 0 | 14 | 14 |
| −42 | 0 | 0 | 21 | 14 |
| −41 | 0 | 0 | 14 | 14 |
| −40 | 0 | 0 | 0 | 0 |
| −39 | 0 | 0 | 7 | 0 |
| Total (%) | 100 | 100 | 100 | 100 |