A+ Radiosonde
The first radiosonde was used in 1929. The Frenchman, Robert Bureau invented it.
A radiosonde(Sondeis French and German for probe) is a unit for use in things such as weather balloons that measures various atmospheric parameters and transmits them to a fixed receiver.
greek fireThe first military secret weapon was called Greek fire.
The radiosonde is attached helium or hydrogen- filled balloon, generally called a weather balloon, and the balloon lifts the radiosonde to altitudes exceeding 115,000 feet. During the radiosonde's ascent, it transmits data on temperature, pressure, and humidity to a sea-, air-, or land-based receiving station (According to google that is) XD ;)
hertz
A saw is short for a military gun, squad automatic weapon. A saw is short for squad automatic weapon. It is a military gun.
Usually, it means the weapon is not available for easy acess.
Infantry.
A battleaxe is an ancient military weapon, a form of axe designed for military combat, or a heraldic term for this form of weapon on a coat of arms.
radiosonde
The military were interested in it as a weapon. and as a source of power in submarines.