The maximum distance at which a gun or missile can engage an aircraft is an important figure. However, many different definitions are used but unless the same definition is used, performance of different guns or missiles cannot be compared. For AA guns only the ascending part of the trajectory can be usefully used. One term is 'ceiling', maximum ceiling being the height a projectile would reach if fired vertically, not practically useful in itself as few AA guns are able to fire vertically, and maximum fuse duration may be too short, but potentially useful as a standard to compare different weapons.
Few AA guns are able to fire which way?
vertically

Theism generally holds that God exists realistically, objectively, and independently of human thought; that God created and sustains everything; that God is omnipotent and eternal; and that God is personal and interacting with the universe through, for example, religious experience and the prayers of humans. Theism holds that God is both transcendent and immanent; thus, God is simultaneously infinite and in some way present in the affairs of the world. Not all theists subscribe to all of these propositions, but each usually subscribes to some of them (see, by way of comparison, family resemblance). Catholic theology holds that God is infinitely simple and is not involuntarily subject to time. Most theists hold that God is omnipotent, omniscient, and benevolent, although this belief raises questions about God's responsibility for evil and suffering in the world. Some theists ascribe to God a self-conscious or purposeful limiting of omnipotence, omniscience, or benevolence. Open Theism, by contrast, asserts that, due to the nature of time, God's omniscience does not mean the deity can predict the future. Theism is sometimes used to refer in general to any belief in a god or gods, i.e., monotheism or polytheism.
What is the suffix theism used for?
used to refer in general to any belief in a god or gods

A district of Himachal Pradesh is an administrative geographical unit, headed by a Deputy Commissioner or District Magistrate, an officer belonging to the Indian Administrative Service. The district magistrate or the deputy commissioner is assisted by a number of officers belonging to Himachal Administrative Service and other Himachal state services. Each district is subdivided into Sub-Divisions, governed by a sub-divisional magistrate, and again into Blocks. Blocks consists of panchayats (village councils) and town municipalities. A Superintendent of Police, an officer belonging to the Indian Police Service is entrusted with the responsibility of maintaining law and order and related issues of the district. He is assisted by the officers of the Himachal Police Service and other Himachal Police officials.
Who heads the Himachal Pradesh?
Deputy Commissioner or District Magistrate