During the year 1350 CE both navigational instruments were in use at that time. However, shipping technology was not present in Europe until approximately 1450. Spain went from having a coastal navy that operated primarily in the Mediterranean and along the Northern European coasts around 1490. To having an international navy and being an international power after Columbus sailed across the Atlantic in 1492. Several reasons for this change, but one was the increased use of technology (coupled with the desire to increase trade and income, among other things) that helped Spanish sailors navigate successfully across vast open bodies of water that contained no landmarks. Due to the technologies of the compass and the astrolabe, the Spanish navy
