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One of the major changes with new ALFS sonar made by Raytheon (used in MH-60R) and its parent FLASH sonar (used in NH-90 and some export MH-60R) made by Thales is that both of these can go down to 750 meters. HELRAS equipping S-70 models can go down to 450 meters only. There are significant...

Lot of details on sonar systems. https://www.forecastinternational.com/samples/F672_CompleteSample.pdf

MH-60R is available only through government to government FMS route at present. Older and less capable S-70 models are available through direct commercial sale (DCS). The big difference between MH-60R and S-70 is the new ALFS system that is significantly more sensitive than older one. AN/AQS-22...