It takes approximately 48 to 72 hours for your level of hCG to double its levels. What this means for you depends on your body. If your level of hCG prior to pregnancy is 2 miU, it might take two to three days for it to double to 4 mIU and another two to three days for that to double to 8 mIU. This means it could take a week for the most sensitive pregnancy test to determine whether or not you a pregnant.
Navigation at Sea, History of. The first Western civilization known to have developed the art of navigation at sea were the Phoenicians, about 4,000 years ago (c. 2000 B.C.E. ). Phoenician sailors accomplished navigation by using primitive charts and observations of the Sun and stars to determine directions.
About 800 BC, the Phoenicians lived on the shores of the eastern Mediterranean. Their major cities were Tyre and Byblos, and they were merchants and sailors.ncient Phoenicia had its heartland in modern-day Lebanon and Syria. Their most famous cities were Tyre, Byblos, Sarpeta, and Sidon. The Phoenicians called themselves the Canaani, but the name we know them by, the Phoenicians, is actually what the Greeks called them.