What invention ensured that a ship could find true north?
A. the seagoing chronometer invented in 1779
B. the seagoing chronometer invented in 1907
C. the gyroscopic compass invented in 1907
D. the gyroscopic compass invented in 1779
A. the seagoing chronometer invented in 1779
B. the seagoing chronometer invented in 1907
C. the gyroscopic compass invented in 1907
D. the gyroscopic compass invented in 1779