[49] Close air support in Vietnam includes all air attacks that are coordinated with the supported force. Radar-controlled bombing and B-52 strikes, in this context, can be called close air support but, for the purposes of this study, the three above mentioned categories will be considered separately. Although the delivery method is technically not a criteria, close air support in this text will refer to those missions where fixed-wing pilots, under the direction of an airborne or ground controller, visually acquire and attack a target in proximity to friendly forces. [50] High and dry meant that all ordnance had been expended. Another frequently used term was "ammo minus." [51] Both crews suffered sore backs from the ejection but no other injury. Lieutenant Colonel Hagaman became the third CO in a row from VMFA-323 to leave an F-4B via the ejection route. Captain Brandon returned to action and eventually compiled 400 combat missions--a first for Marine Radar Intercept Officers. [52] To catch stunned survivors above ground, the 1/13 batteries frequently put massed artillery fire into the target area 10 to 15 minutes after the bombers departed. [53] General Westmoreland gave his constant personal attention to the targeting of these strikes and while most of the targets were generated by the 26th Marines Headquarters, General Westmoreland personally approved the requests. Based on intelligence he also directed or diverted B-52 raids from Saigon. To keep right on top of this aspect of the battle, the general slept at night in his Combat Operations Center during the siege. [54] The 26th Marines Command Chronology does not list sorties but strikes which were made up of several aircraft and 430 strikes were recorded. [55] The van, as well as crew living quarters, was emplaced underground and was heavily sandbagged. The sturdiness of the bunker was an important factor because of the heavy shelling. One enemy round scored a direct hit on top of the bunker with no damage to the fragile equipment. The computer van remained operational throughout the siege. [56] The term "pickled" is slang used by pilots which means to drop their ordnance. [57] When a TPQ-10 broke lock, the radar beam strayed from the aircraft and inputs to the computer were interrupted. The operator also lost visual contact on the radar screen. [58] One 105mm howitzer on 881S was also destroyed. [59] Not every artillery round that left Khe Sanh was high explosive. During March, Lieutenant Colonel Hennelly's battalion had accumulated more ammunition than it could safely store. Since the ammo would not fit in the berms and presented a hazard above ground, the decision was made to fire it all. This excess included some 90-odd rounds of green smoke. On 17 March--St. Patrick's Day--the Marines fired all the green smoke rounds on known enemy positions to honor the patron saint of the Fighting Irish.