Category 2
Underwater Acoustic Signal Processing

2.1	Acoustic medium modeling and effects
2.2	Array processing and beamforming
2.3	Detection, classification and localization (active/passive)
2.4	Time delay estimation
2.5	Ocean signal processing: radar, geophysical and biomedical
2.6	Matched field processing and channel modeling with uncertainties
2.7	Ocean acoustic tomography
2.8	Theoretical and applied underwater acoustics
2.9	Other (specify)