Once the planes were off the ground, the wizzos changed over to the radio frequency of the E-3 Sentry Airborne Warning and Control System, or AWACS.
Martain contacted the AWACS controller, using his call sign for the day, Omaha 01. The controller gave him an update on the situation in the area of operations. With everything in order, the F-15s climbed to an altitude of 40,000 feet. Martain's wingman, Omaha 02, took up aposition two miles to Martain's left, a little behind and at 42,000 feet. When they were set, the two aircraft proceeded north of Tarom, where they took up station, flying in an oval patrol pattern. In this way they placed themselves between the most likely threat, the Soviets, and the air assault operation that was going into Tarom, while the E-3 Sentry, operating over the Persian Gulf, scanned the entire. area of operations with its powerful radar, watching for threats from any direction.
Radar, first used in World War II, is a double-edged sword. Radar emits an electronic beam capable of searching and tracking, like a flashlight's beam. And, like a flashlight's beam, it can, itself, be detected by an enemy and used to locate its source. Unfortunately for the transmitter of the beam, it can be detected at a greater distance than it can detect targets. Furthermore, each type of radar has its own peculiar signature, so that a radar beam transmitted by an E-3 Sentry and intercepted by an enemy can be identified as originating from a Sentry. For this reason the F-15s were running with their radars off. Although Soviet radar would be able to see the F- 15s, the type of aircraft would not be known until the F- 15s turned on their own radars or were within visual range of Soviet fighters.
Before that happened, the Sentry would see the Soviets coming and alert the F-15s. An airborne controller on the Sentry would track the Soviets, estimate their destination and intentions, and relay the information to the F15s. This information would include a plotted course that would allow the F-15s to intercept the Soviets from a position of advantage. Soviet controllers, working from the other side, would be doing the same for their pilots.
Omaha 01 and 02 had been on station for better than forty minutes when the controller on the Sentry alerted them that two "boggles"-enemy planes-were flying southeast on a course that would take them over Bandar Abbas. As the control relayed information on the targets, the commander on the Sentry decided to commit Omaha 01 and 02 to intercept the boggies. Though Martain's two planes were primarily ground-attack aircraft, there was little use for them in that role and a pressing need for fighters. This suited Martain just fine. He had never liked the idea of becoming a mud mover and relished the idea of playing Steve Canyon, even if it was only for a day. While the pair of aircraft were still over two hundred miles away, the controller began to vector, or direct, Omaha 01 and 02 along an intercept course.
While one controller worked the intercept, others aboard the Sentry were looking for telltale signs of additional Soviet activity. The electronic-warfare operator checked for any signs of interference, jamming or electronic deception, called "spoofing." Other controllers watched their assigned sectors in an effort to find more boggies. The commander of the Sentry contacted headquarters at Bandar Abbas and informed them of the situation. He then instructed the controller working Omaha's intercept to remind Omaha 01 of the rules of engagement: he was not to fire unless fired upon. As yet, there had been no shooting incidents between U.S. and Soviet forces. This was shaping up to be the first confrontation between the two superpowers in Iran.
While the two sets of blips-one representing Omaha Flight and the other the boggies-converged on each other on the controller's radar screen, the commander of the Sentry watched the Soviets intently. He tried to detect any deviation that might indicate that they were being controlled by a Soviet AWACS or ground-control station and were aware of the F-15s' presence. At the one-hundred-mile point, there were no indications of that as the two sets of blips continued to close. The Soviets were coming in fast and dumb. The controller continued to relay information to Omaha 01 and study the two converging plots.
At the fifty-mile mark the F- 15s had maneuvered into a position to the left of the Soviets' flight path. This put them out of the area covered by the forward-looking radar of the Soviets, meaning that the boggies could not detect the F-15s on their own. The Soviets continued to fly along their original course without deviating, despite the threat the F-15s now posed, indicating that they were 103 operating without ground or air control. The commander of the Sentry leaned back in his seat, stroked his chin and paused to think about that for a moment. That was dumb, really dumb. The Soviets had AWACS in Iran.
They also had forward-deployed ground-control stations. He could not imagine why these two Soviet aircraft were flying blind and without control. The commander knew that the only way to find out what they were about was to challenge them. On board the Sentry, it was decided, therefore, to have the F-15s continue without turning on their radars until they were within missile range.
Two hundred miles away, Martain was becoming anxious. He wanted to gain control of the situation. Although he trusted the controller and agreed that the decision to continue with their radar off until the last minute was probably a good one, he didn't like getting this close to a shooting situation without being in positive control. His wizzo was equally anxious in the backseat, surrounded by millions of dollars of equipment, with nothing to do as they traveled at hundreds of miles an hour toward a potentially hostile contact. Secretly, the wizzo prayed that when the word was given and he hit the switch, all his gizmos would work. Otherwise, they would be very embarrassed.
Finally, at the fifteen-mile point, the controller gave Omaha 01 the word to turn on their radars and intercept, but not engage unless fired upon. At the same instant, both F- 15s hit their radars. In a flash the radar screens lit up showing two bright-green blips at a range of fifteen miles and slightly below. The intercept plot they had received from the Sentry had been so good that the pilots needed only minor corrections before they were able to achieve radar lock on the boggies.
In the Soviet aircraft, radar-warning receivers flashed on, sending a rapid beeping tone through the pilots' headphones. For an instant, the two Soviet pilots were bewildered. Their heads darted about, looking from their radar screens to the outside, unable to detect anything on radar or visually.
When the warning changed pitch to a steady tone, indicating that their unseen assailants had achieved radar lock and were about to engage, they both reacted 104 by increasing speed, taking a sharp, turning dive and jiggling their planes in an effort to break radar lock.
Both Omaha 01 and 02 had anticipated the Soviets' reaction. With a "Tally ho!" from Martain, they followed the Soviets' maneuver. Though the Soviets were able to break radar lock momentarily, the F-15s were quickly able to get it back. After several seconds of this, the Soviets realized that if the Americans were going to attack they would have already done so. Having accomplished the mission of their patrol, to test the U.S. reaction and find out how far they could go before being intercepted, the Soviet flight leader ordered his wingman to follow him. Making a sharp turn to the northwest, the two Soviet fighters came about and kicked in their after burners. When the commander aboard the Sentry saw the Soviets break and fly northward, he ordered the controller to instruct the F-15s to break off the pursuit and vector them to a waiting KC-130 for in-flight refueling. From there, they were to return to their patrol pattern.