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Helicopter Ditching: Time of Crash and Survivability

机译:直升机降落:坠毁时间和生存能力

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This study examines helicopter ditchings using the variable "Time of Crash" as a primary factor affecting survival rates and survivability. One hypothesis held by the authors argues that a combination of several factors including: Time of Crash (divided into 6 hour blocks), (2) Position of the Helicopter (float/sank), (3) Inversion (immediate/delayed), and (4) Cause of Ditching (pilot error/mechanical/weather) may lead to more crashes and a reduced survival rate. The dataset for this study includes 151 helicopter ditching cases that occurred between 1993 and 2005.rnSurvival rates (overall % survived for each case) and survivability (≤/> 50%) was used to assess the effect of the four variables. Analyses reveal a significant relationship exists between survivability and time of crash (p = .009), float (p < .001), inversion (p < .001), and cause (p = .02).rnThirteen of the 21 cases (62%) occurring after 6 pm resulted in less than 50% survivability. Further, pilot error was noted in seven of the 13 cases (54%) occurring after 6 pm. However, the complexity of the interaction between survival and each of the chosen variables is difficult to separate out due to limited accident investigation information.
机译:这项研究使用变量“坠落时间”作为影响生存率和生存能力的主要因素,研究了直升机的排水沟。作者提出的一种假设认为,以下几个因素的综合因素:坠机时间(分为6个小时),(2)直升机的位置(浮动/下沉),(3)反转(立即/延迟)和(4)开沟的原因(飞行员错误/机械/天气)可能导致更多的坠机并降低生存率。该研究的数据集包括1993年至2005年之间发生的151起直升机开沟事件.rn生存率(每个案例的总生存百分比)和生存能力(≤/> 50%)用于评估这四个变量的影响。分析表明,生存能力与坠机时间(p = .009),浮力(p <.001),倒转(p <.001)和原因(p = .02)之间存在显着关系.rn在21例病例中有13例(p下午6点后发生的事故(62%)导致存活率不足50%。此外,在下午6点之后发生的13例病例中,有7例(54%)出现飞行员错误。然而,由于有限的事故调查信息,难以区分生存与每个选定变量之间相互作用的复杂性。

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