Our Hueys only had one ADF for navigation - our brilliant government paid to have the Tacan removed and a lead weight installed to keep the balance.
Doing IF training at Canberra, we would fly the Twin-NDB approach. Dial up the first one with the rotating dial (not numbered clicks, just roll till you hear the station) and fly the inbound leg. Overhead, mad scramble to dial the next one, identify, get back on the correct bearing, and hope for a high cloudbase. Luckily we were slow enough to have time for the nimble-fingered switch flicking between stations.