Rev. P. Castro (Probably on the left), a horse-back circuit rider, takes the gospel to isolated villages in the mountains. At the height of the rainy season, these villages are cut off because of swollen rivers. Rev. Castro will place these ten PMs among the villages so that the gospel could be heard when he cannot visit. DZB2 is the "tropical band" short wave service of FEBC Manila, covering areas outside the reach of DZAS-AM.