Your ELT is not telling vital information on 121.5 but you as a person can give a location and say in trouble. Your reliance on the ELT on 121.5 and 406 will create a delay in search until confirmed a problem exists (they will call all contact numbers first to confirm a problem may exist if registered)
Most choppers I know belting out remote are R22 no HF, but a sat phone under the seat and not accessible in flight as other stuff on seat.
I would be asking help on 121.5 first even if it only saves 20 mins on a search.