“In a way, this is a secret trip,” he said after he had given directions to the driver. “Ever see a radio monitoring truck?”
“Never even heard of one,” Penny replied. “What is it?”
“Well, we have a truck equipped so that our instruments pick up the direction from which any short wave broadcast is sent. It’s not generally known that the Army’s at work here, so whatever you girls see you must keep under your sunbonnets.”
The taxi sped along the country road, following a route that was unfamiliar to the girls. By the time it drew up several miles from Sunset Beach the rain had ceased.
“Tumble out,” Jerry said, opening the cab door. “This is the end of the line.”
He went ahead, breaking a hole in the tall hedge at one side of the road. Eagerly the girls followed him through the gap. In a clearing just beyond a clump of saplings stood what appeared to be an ordinary covered Army truck.
An enlisted man came toward Jerry and the girls, saluting smartly.
“Are you picking up any signals?” Jerry asked him.
“Nothing yet, sir. The weather hasn’t been very favorable.”
“You’ve had your equipment set up here two days now?”