When we hid a regular flow of sound, keen material and the PFF Navigation Training Unit was in full swing, we saw the steady development of tactics geared to the constant production of new and better " stores " — target indicators, hooded flares and many other innovations, all of which was more than matched by the improvement in navigational techniques.
When we hid a regular flow of sound, keen material and the PFF Navigation Training Unit was at a swingset, we saw the steady development of tactics geared to the constant production of new and better " stores " — target indicators, hooded flares and many other innovations, all of which was more than matched by the improvement in navigational techniques.