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燧鲷目 澳洲燧鲷 Trachichthys australis 科学分类 界： 动物界 Animalia 门： 脊索动物门 Chordata 纲： 辐鳍鱼纲 Actinopteri 高群： 骨舌鱼高群 Osteoglossocephalai 总群： 鲱形总群 Clupeocephala 群： 正真骨鱼群 Euteleosteomorpha 亚群： 新真骨鱼亚群 Neoteleostei 下群： 宽鳍下群 Eurypterygia 派： 栉鳞派 Ctenosquamata 亞派： 棘鳍亚派 Acanthomorphata 类： 棘鳍类 Acanthopterygii 亚门： 金眼鲷亚类 Berycimorphaceae 目： 燧鲷目 Trachichthyiformes J.A.Moore, 1993 科 狼牙鯛科 Anoplogastridae 黑銀眼鯛科 Diretmidae 燈眼魚科 Anomalopidae 松毬魚科 Monocentridae 燧鯛科 Trachichthyidae 燧鲷目 （学名： Trachichthyiformes ）是輻鰭魚綱的一目，有时也归类于金眼鯛目之下成为 燧鯛亞目 （ Trachichthyoidei ） [1] 。 分类 内部分类 其下分5科，如下 [1] [2] ： 狼牙鯛科 Anoplogastridae 黑銀眼鯛科 Diretmidae 燈眼魚科 Anomalopidae 松毬魚科 Monocentridae 燧鯛科 Trachichthyidae 参考文献 ^ 1.0 1.1 Betancur-R, Ricardo; Wiley, Edward O.; Arratia, Gloria; Acero, Arturo; Bailly, Nicolas; Miya, Masaki; Lecointre, Guillaume; Ortí, Guillermo. Phylogenetic classification of bony fishes....

This article is about the military and vehicle technology. For its use in gaming, see HUD (video gaming). HUD of an F/A-18 Hornet A head-up display or heads-up display , [1] also known as a HUD , is any transparent display that presents data without requiring users to look away from their usual viewpoints. The origin of the name stems from a pilot being able to view information with the head positioned "up" and looking forward, instead of angled down looking at lower instruments. A HUD also has the advantage that the pilot's eyes do not need to refocus to view the outside after looking at the optically nearer instruments. Although they were initially developed for military aviation, HUDs are now used in commercial aircraft, automobiles, and other (mostly professional) applications. Contents 1 Overview 1.1 Types 1.2 Generations 2 History 3 Design factors 4 Aircraft 4.1 Displayed data 4.2 Military aircraft specific applic...