What frequency band do Sonobuoys transmit in?

Sonobuoys typically transmit in the Very High Frequency (VHF) band. This frequency range is used primarily for various communication applications, including maritime and aerial operations. VHF allows for line-of-sight communication, which is essential for sonobuoys used in anti-submarine warfare to send acoustic data back to aircraft or ships monitoring underwater activities.

The characteristics of the VHF band, such as relatively high transmission power and effective transmission over water, make it suitable for the distances involved in sonar operations. It also provides a balance between range and fidelity of the transmitted signals, which is crucial for analyzing underwater acoustic data.