would arrive at the range a few minutes before one o’clock which was the time the batteries were scheduled to fire. The operators and the panelmen would get busy setting up the aerial wire system. This consisted of two jointed masts about fifteen feet high and each one of which was made in five sections.
The masts would be set up about a hundred yards apart and a single aerial wire was stretched between them. The leading-in wire was then connected to a receiving set and the latter to the ground. This was formed of a pair of wires stretched on the ground directly under the aerial wire and to each of their free ends a copper mat was fixed with a little dirt thrown over it.
The whole equipment is so built that we used to set it up ready for work in from three to five minutes. The operators then adjusted their head-phones and were ready to tune-in the incoming signals from the airplane as soon as it should come in sight. You see, our detail on the ground only received wireless signals from the airplane while the operator in it, or observer as he is called, only sent wireless signals. This one sided arrangement had to be used because
