Indication Enemy troops to your front, in the undergrowth. Type Bursts, Watch and shoot, watch and shoot. A Fire control order, as it's a vocal, not a visual, command, can either be shouted, or be sent over radio, both as effectively as the other. A major part of his training, like other Territorial Army soldiers, involved the tactical uses of radios and field signals in general. He has also been a licensed Radio Amateur, call sign G1LIW, since 1985.
Amateur radio is the hobby of two-way radio communications.