These depressions cause severe weather at sea and bring light though very constant rain to its shores (known as "orballo", "sirimiri", "morrina", "orbayu", "orpin" or "calabobos"). Sometimes powerful windstorms form if the pressure falls rapidly (Galernas), traveling along the Gulf Stream at great speed, resembling a hurricane and finally crashing in this bay with their maximum power, such as the Klaus storm. The Gulf Stream enters the bay following the continental shelf's border anti-clockwise (the Rennell Current), keeping temperatures moderate all year long. The main cities on the shores of the Bay of Biscay are Bordeaux, Bayonne, Biarritz, Brest, Nantes, La Rochelle, Donostia-San Sebastián, Bilbao, Santander, Gijón and Avilés. The southern end of the gulf is also called in Spanish ""Mar Cantábrico"" (Cantabrian Sea), from the Estaca de Bares, as far as the mouth of Adour river, but this name is not generally used in English. It was named by Romans in the 1st century BC as "Sinus Cantabrorum" (Bay of the Cantabri) and also, "Mare Gallaecum" (the Sea of the Galicians). On some medieval maps, the Bay of Biscay is marked as "El Mar del los Vascos" (the Basque Sea). The Bay of Biscay has been the site of many famous naval engagements over the centuries. In 1592 the Spanish defeated an English fleet during the Battle of the Bay of Biscay. The Biscay campaign of June 1795 consisted of a series of manoeuvres and two battles fought between the British Channel Fleet and the French Atlantic Fleet off the southern coast of Brittany during the second year of the French Revolutionary Wars. sank here after striking a naval mine on 22 June 1918. In 1920 sank after losing power and drifting into a reef in a storm with the loss of 575 lives. On 28 December 1943, the Battle of the Bay of Biscay was fought between and and a group of German destroyers as part of Operation Stonewall during World War II. sank on 25 August 1944 in position , when she struck a mine. All hands were lost. On 12 April 1970, sank in the Bay of Biscay due to a fire that crippled the submarine's nuclear reactors.