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  2. United States Marine Corps Combatant Diver Course - Wikipedia

    en.wikipedia.org/wiki/United_States_Marine_Corps...

    Both of the Marine Air-Ground Task Force reconnaissance assets, FMF Recon and MarDiv Recon, widely use combatant diving. During this eight-week course, trainees are introduced to open and closed-circuit diving (using the Dräger LAR-V rebreather), diving physics and medical aid. Most of the training in combatant diving is done at night.

  3. R Coronae Borealis - Wikipedia

    en.wikipedia.org/wiki/R_Coronae_Borealis

    The variability of R Coronae Borealis was discovered by English astronomer Edward Pigott in 1795. [13] In 1935 it was the first star shown to have a different chemical composition to the Sun via spectral analysis. [17] R Coronae Borealis is the prototype of the R Coronae Borealis class of variable stars.

  4. Recondo - Wikipedia

    en.wikipedia.org/wiki/Recondo

    Recondo is an American military acronym (from RECONnaissance commanDO [1]) for a highly specialized infantry training or a graduate of a Recondo School who leads a small, heavily armed long-range reconnaissance team that patrols deep in enemy-held territory. [2]

  5. Cosmic explosion will be visible to the naked eye in once-in ...

    www.aol.com/news/cosmic-explosion-visible-naked...

    Astronomers around the world are monitoring activity in the T Coronae Borealis system. Once an eruption is detected, Schaefer said, the best and brightest views will likely come within 24 hours ...

  6. Glossary of military abbreviations - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_military...

    A A&TWF – Acquisition and technology work force a – Army AA – Assembly area AA – Anti-aircraft AA – Aegis ashore AAA – Anti-aircraft artillery "Triple A" AAAV – Advanced Amphibious Assault Vehicle AAC – Army Air Corps AAD – Armored amphibious dozer AADC – Area air defense commander AAE – Army acquisition executive AAG – Anti-aircraft gun AAK – Appliqué armor kit (US ...

  7. Reconnaissance - Wikipedia

    en.wikipedia.org/wiki/Reconnaissance

    U.S. Marines on a recon mission during a field training exercise in 2003. In military operations, military reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, the terrain, and civil activities in the area of operations.

  8. Gamma Coronae Borealis - Wikipedia

    en.wikipedia.org/wiki/Gamma_Coronae_Borealis

    Gamma Coronae Borealis, Latinized from γ Coronae Borealis, is a binary star system in the northern constellation of Corona Borealis. It is visible to the naked eye with an apparent visual magnitude of 3.83. [5] Based upon an annual parallax shift of 22.33 [1] mas as seen from Earth, it is located about 146 light years from the Sun.

  9. Borealis - Wikipedia

    en.wikipedia.org/wiki/Borealis

    Borealis, a documentary film directed by Kevin McMahon; Borealis Records, a Canadian record label; Borealis, a ship in the Half-Life and Portal video game series; Borealis, the Freezing Fog , a creature from the 2022 video game Elden Ring; Borealis, a song from the 2019 album Good Faith by French music producer Madeon