Sea in culture of barbarian invaders and knowledge of geography took a backward step. In the seventh century, Isidore of Seville produced a "wheel map" in which Asia, Africa and Europe were arranged like segments in an orange, separated by the "Mare Mediterranean", "Nilus" and "Tanais" and surrounded by "Oceanus". It was not until the fifteenth century that Ptolemy's maps were used again and Henry the Navigator of Portugal initiated ocean exploration and maritime research. Encouraged by him, Portuguese navigators explored, mapped and charted the west coast of Africa and the Eastern Atlantic and this knowledge prepared the way for the great voyages
Ocean Shores Municipal Airport Ocean Shores Municipal Airport Ocean Shores Municipal Airport is a city-owned, public-use airport located two nautical miles (4 km) northeast of the central business district of Ocean Shores, a city in Grays Harbor County, Washington, United States. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility. Ocean Shores Municipal Airport covers an area of 49 acres (20 ha) at an elevation of 15 feet (5 m) above mean sea level. It has one runway designated 15/33 with an asphalt surface measuring 3,100 by 50 feet (945 x 15