NRL 12 & 1.2 kHz Parametric Interferometric Sidescan
12 kHz Tx/Rx, 2 rows x 58 elements, SL(primary)=241 dB, 60° x 2.5° beam, SL(secondary)?203 dB 100 m generation zone
0.5 - 2 kHz Rx only, 2 rows x 14 elements,
1.18 x 10 m aperture, 2° receive beam-forming @ 1500 Hz.
Wood et al. (1992-99) + Alliant Techsystems: Towed System for shallow water detection of on-seabed and buried mines to 800 m. Rx horizontal
and vertical beam-forming gives range, vertical angle to target.