Viking halberd "spear". The "kesja" was another halberd-type weapon. The name is thought to come from Celtic-Latin "gæsum". The Cleasby and Vigfússon dictionary notes that ""kesja", "atgeir" and "höggspjót" appear to be the same thing". It's interesting to note that "Egils saga" shows the "kesja" being thrown like a javelin or spear, and describes it in detail, calling it also a "mail-piercer" ("brynþvarar"): The "kesja" would thus have a blade around 90 cm in length with a diamond cross-section at the end, and an additional spike attached to the socket, whose placement and purpose is not explained. The length of the weapons'
Radar configurations and types Radar configurations and types Radar configurations and types is an article about listing the different uses of radars. Radar come in a variety of configuration in the emitter, the receiver, the antenna, wavelength, scan strategies, etc. Search radars scan great volumes of space with pulses of short radio waves. They typically scan the volume two to four times a minute. The waves are usually less than a meter long. Ships and planes are metal, and reflect radio waves. The radar measures the distance to the reflector by measuring the time of the roundtrip from emission of a pulse to reception,