What two instruments made navigation much easier in the 1900s?
A.) Global Positioning Satellite (GPS) and two-way radio
B.) The chronometer and the astrolab
C.) The cross-staff and the compass
D.) The chronometer and the compass
Answer: A. Global Positioning Satellite (GPS) and two-way radio
The two instruments that were used and that were made navigation convenient and easier in 1990s are the GPS and the two-way radio. GPS is a tracking system using Global Navigation Satellite System.
