BBC 'Field Find'
Many years ago the BBC (I think it was) use to produce a nice little blue book with all their radio frequencies (and locations).
Not exactly to be used for a min app aid, but very handy to 'assist' a 'field find' in locally poor conditions in a strange area.
However one must bear in mind the various 'limitations' of this non vhf aid which the Nav instructor at Oxford would confirm 'always pointed to the nearest thunderstorm'. Has its use's if used with care, but really only a cloud break with a high min. Good training for single pilot workload, as once mastered sets you up for the future.