Berliner D S
Aviat Space Environ Med. 1975 Oct;46(10):1267-70.
Nap-of-the-earth flying was conceived by the U.S. Army to evade enemy detection of rotary wing aircraft, requiring the stressful technique of aircraft movement only inches above the ground terrain. The 100st Airborne Division (Airmobile), Fort Campbell, Ky, tested the nap-of-the earth (NOE) concept from 12 June, 1973, to 30 June, 1974, flying 3267.6 h in NOE training. Four aircraft incidents occurred during this training period, with three of these taking place prior to 1 March, 1974. At that point, after 59.2% of the total hours had been flown, NOE pilot training was curtailed from 8 h/d to 4 h/d. Objective and subjective data infer that pilot (crew) rest and the length of the flying day are important factors in the safety of NOE flying.
超低空飞行是美国陆军为躲避敌方对旋翼飞机的探测而设想的，它要求飞机在离地面仅几英寸的高度飞行，这是一项压力巨大的技术。肯塔基州坎贝尔堡的第101空降师（空中机动）于1973年6月12日至1974年6月30日对超低空飞行（NOE）概念进行了测试，在超低空飞行训练中飞行了3267.6小时。在此训练期间发生了4起飞机事故，其中3起发生在1974年3月1日之前。那时，在飞行总时长达到59.2%之后，超低空飞行飞行员训练从每天8小时缩减至每天4小时。客观和主观数据表明，飞行员（机组人员）的休息以及飞行日的时长是超低空飞行安全的重要因素。
