Editing 2627: Types of Scopes
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| {{w|Periscope }}|| Periscopes allow submarine crews to watch what happens above the water surface, without exposing the submarine to enemy observers, or enemy radars. In practice, periscope use is minimized because periscopes are still observable, but to a lesser degree. || An electron microscope seemingly mounted on a periscope. Examining enemy boats like a periscope, with the detail of an electron microscope. This would not be useful in combat.{{Citation needed}} || In principle, the German navy invented radio periscopes during World War II. The {{w|Metox radar detector}}'s early antenna had to be built up after surfacing and dismantled before diving. Later, the fixed ''Bali'' antenna could act as a true periscope, in order to detect aircraft and ships that were using radar to hunt submarines. | | {{w|Periscope }}|| Periscopes allow submarine crews to watch what happens above the water surface, without exposing the submarine to enemy observers, or enemy radars. In practice, periscope use is minimized because periscopes are still observable, but to a lesser degree. || An electron microscope seemingly mounted on a periscope. Examining enemy boats like a periscope, with the detail of an electron microscope. This would not be useful in combat.{{Citation needed}} || In principle, the German navy invented radio periscopes during World War II. The {{w|Metox radar detector}}'s early antenna had to be built up after surfacing and dismantled before diving. Later, the fixed ''Bali'' antenna could act as a true periscope, in order to detect aircraft and ships that were using radar to hunt submarines. | ||
β | Radio signals do not propagate well in water, so raising a radio receiver above the water would be necessary for listening to | + | Radio signals do not propagate well in water, so raising a radio receiver above the water would be necessary for listening to NPR or any radio station which is not in the {{w|extremely low frequency}} band. |
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| {{w|Stethoscope}} | | {{w|Stethoscope}} |