'Aircraft often use the "gyro" type of this instrument, as it's unaffected by local magnetic fields'
a compass
GENERAL SCIENCE: Aircraft often use the gyro type of this instrument, as its unaffected by local magnetic fields
Aircraft often use the "gyro" type of this instrument, as it's unaffected by local magnetic fields
Aircraft often use the "gyro" type of this instrument, as it's unaffected by local magnetic fields
GENERAL SCIENCE
a compass
GENERAL SCIENCE