1 |
3–30 Hz, ELF band |
Underwater communications and pinging |
2 |
30–300 Hz, super low frequency (SLF) band |
Underwater submarine communications |
3 |
300 Hz–3 kHz, ultra low frequency (ULF) band |
Underwater communications through dirt and rocks |
4 |
3 kHz–30 kHz, very low frequency (VLF) band |
Near-sea-surface communications, navigation beacons |
5 |
30 kHz–300 kHz, low frequency (LF) band |
Near-sea-surface communications, navigation beacons |
6 |
3 kHz–30 kHz, VLF band |
Near sea surface communications, navigation beacons |
7 |
Less than 1 kHz, 1 kHz–10 kHz, greater than 10 kHz, and less than 30 kHz |
Active sonar operation |
8 |
50 kHz, 120 kHz, 200 kHz, and 455 kHz |
Sport fishing |
9 |
120 kHz, and 200 kHz |
Sea floor imaging using deep towed sonar, and swath phase-bathymetric mapping |
10 |
100 kHz–1 MHz |
Side-scan sonar |