OurAirports has records for 5 different navaids with the identifier "HM". Please select the one you'd like to view.
Australia
383 KHz (HM .... --)
.... --
114.40 MHz (HM .... --)
Canada
221 KHz (HM .... --)
Hungary
420 KHz (HM .... --)
Japan
337 KHz (HM .... --)