Yeah! Except for when the weather is a thunderstorm and the ADF points to it instead of the navaid.
The old NDB for Gizo(one of the more reliable ones that actually worked most of the time, -when that was all there was-)was located on Gizo island(the town island, where there was power), not at the airport island of Nusatupe. If it failed, the procedure could be used on the radio station as the aerial for it was nearby. If the power was out on it too, plan B regarding a visual approach became effective.. These days there is a GPS procedure for each end of Nusatupe, but the guys don't try as hard.