Seriously, in the stock game, you can't, MAD and dipping sonar are not on the FFG AI MH60 in the stock game at all.
The LWAMI Mod adds full dipping sonar and MAD capability to the FFG MH60, although a few updates need to be made, it works pretty well right now in LWAMI 3.02. People seem pretty happy with it, despite some helo crashes and undesired sensor behavior on occasion, all in all, given the hell I went through to do it, I'm happy with how it came out, even in 3.02.
Cheers,
David