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The -ir verbs differ from the -er verbs in the following points: The vowel of the inflections is always -i-, for example -isse in the past subjunctive rather than the -asse of the -er verbs. A few of the singular inflections themselves change, though this is purely orthographic and does not affect the pronunciation: in the simple present and ...
Instrument rating refers to the qualifications that a pilot must have in order to fly under instrument flight rules (IFR). It requires specific training and instruction beyond what is required for a private pilot certificate or commercial pilot certificate, including rules and procedures specific to instrument flying, additional instruction in meteorology, and more intensive training in flight ...