|
Distance
above seafloor (m) |
Aperture
(°) |
Diameter
insonified (m) |
Area as seen
from sea surface (%) |
|---|---|---|---|
| 3 | 26.8 | 3 | 0.1 |
| 5 | 21.1 | 3.9 | 0.1 |
| 10 | 15.1 | 5.4 | 0.2 |
| 15 | 12.4 | 6.6 | 0.3 |
| 20 | 10.8 | 7.6 | 0.4 |
| 50 | 6.9 | 12 | 1 |
| 100 | 4.9 | 17 | 2 |
| 750 | 1.8 | 46.5 | 15 |
| 1500 | 1.3 | 65.7 | 30 |
| 2250 | 1 | 80.5 | 45 |
| 3000 | 0.9 | 93 | 60 |
| 3750 | 0.8 | 103.9 | 75 |
| 4500 | 0.7 | 113.8 | 89.9 |
| 5000 | 0.7 | 120 | 100 |