| 11. | The vessels are fitted with a C-Tech CMAS 36 / 39 hull-mounted high-frequency active sonar.
|
| 12. | When they go to active sonar, it attracts the attention of the wandering Moby Dick.
|
| 13. | Active sonar emits a sound wave and detects echoes from the hulls of other vessels.
|
| 14. | Active sonar creates a echo ) of the pulse.
|
| 15. | Active sonar is mainly used for under ice operations.
|
| 16. | The ships also have active sonar, radiological detectors, laser detectors and detector for radar irradiate.
|
| 17. | A submarine usually relies on passive detection, not risking active sonar or a periscope observation.
|
| 18. | Active sonar uses the reflection of sound emitted from the search equipment to detect submarines.
|
| 19. | For analogous reasons active sonar needs to transmit in a narrow beam to minimise scattering.
|
| 20. | For ASW the inner screen needs good active sonar.
|
