Yehudi lightsYehudi lights are lamps of automatically controlled brightness placed on the front and leading edges of an aircraft to raise the aircraft's luminance to the average brightness of the sky, a form of active camouflage using counter-illumination. They were designed to camouflage the aircraft by preventing it from appearing as a dark object against the sky.
CamouflageConcealment in plain sight by any means, e.g. colour, pattern and shapeThe peacock flounder can change its pattern and colours to match its environment.A soldier applying camouflage face paint; both helmet and jacket are disruptively patterned.Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else.
Ship camouflageShip camouflage is a form of military deception in which a ship is painted in one or more colors in order to obscure or confuse an enemy's visual observation.
Counter-illuminationCounter-illumination is a method of active camouflage seen in marine animals such as firefly squid and midshipman fish, and in military prototypes, producing light to match their backgrounds in both brightness and wavelength. Marine animals of the mesopelagic (mid-water) zone tend to appear dark against the bright water surface when seen from below.
Royal Canadian NavyThe Royal Canadian Navy (RCN; French: Marine royale canadienne, MRC) is the naval force of Canada, and one of three environmental commands of the Canadian Armed Forces. The command's official strength includes 8,400 Regular Force sailors, 4,100 naval reservists, and a fleet that includes 25 commissioned warships and additional auxiliary vessels. The RCN is headquartered in Ottawa, with its commander reporting to the Chief of Defence Staff.
RadarRadar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations and terrain. The term RADAR was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging".
Battle of the AtlanticNaval campaign in World War IIBelligerentsUnited KingdomUnited StatesSoviet UnionCanadaBrazilOther participants:Norway France PolandNetherlandsBelgiumGreece Australia New ZealandNewfoundland India South Africa Germany ItalyCommanders and leadersLeonard W. MurrayDudley Pound #Andrew CunninghamMartin Dunbar-NasmithPercy NobleMax HortonFrederick BowhillPhilip de la FertéJohn SlessorRoyal E. IngersollJonas H. IngramErich RaederKarl DönitzH.G. von FriedeburgEberhard GodtAlfred SaalwächterWilhelm MarschallTheodor KranckeMartin HarlinghausenUlrich KesslerAngelo ParonaRomolo PolacchiniEnzo GrossiCasualties and losses36,200 killed (naval)36,000 killed (merchant navy)3,500 merchant vessels lost175 warships lost741 RAF Coastal Command aircraft lost in anti-submarine sorties ≈30,000 U-boat sailors killed783 submarines lost47 other warships lost c. 500 killed17 submarines lostThe Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II.
Royal NavyThe Royal Navy (RN) is the naval warfare force of the United Kingdom, responsible for defending the country, the Crown Dependencies, and the Overseas Territories from naval attack or invasion. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France.
CorvetteA corvette is a small warship. It is traditionally the smallest class of vessel considered to be rated a warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war. The modern roles that a corvette fulfills include coastal patrol craft, missile boat and fast attack craft. These corvettes are typically between 500 and 2,000 tons.
Active camouflageActive camouflage, adaptive camouflage, or chameleonizing is camouflage that adapts, often rapidly, to the surroundings of an object such as an animal or military vehicle. In theory, active camouflage could provide perfect concealment from visual detection. Active camouflage occurs in several groups of animals, including reptiles on land, and cephalopod molluscs and flatfish in the sea.
World War IIGlobal conflict from 1939 to 1945BelligerentsAlliesAxisCommanders and leadersMain Allied leaders: Joseph StalinFranklin D. RooseveltWinston ChurchillChiang Kai-shekMain Axis leaders: Adolf HitlerHirohitoBenito MussoliniCasualties and losses 60–75 million deaths (military and civilian) World War II, or the Second World War (1 September 1939 – 2 September 1945), was a global conflict between two coalitions: the Allies and the Axis powers.
United States NavyMaritime service branch of the U.S. militaryMilitary unitThe United States Navy (USN) is the maritimeservice branch of the United States Armed Forces and is designated as the navy of the United States in the Constitution. With 290 combat vessels, it is the world's second largest navy, behind the People's Liberation Army Navy, and by far the largest by displacement, at 4.5 million tons in 2021.*As an Amazon Associate I earn from qualifying purchases.