магнітне схилення
magnetic variation / magnetic declination
magnetic bubble memory / magnetic bubble store
declination
declination diagram
declination aiming circle (declinated aiming circle)
declination chart
declination index
declination pin
angle of declination
map declination
grid declination
declination constant
declination protractor
declination statement
declination station
grid magnetic angle
magnetic anomaly detection (MAD) gear
magnetic azimuth
magnetic bearing
magnetic intelligence
magnetic mine
magnetic mine hunting
magnetic needle
magnetic north (MN)
magnetic target sensor
magnetic focus
artificial magnetic anomalies
dip-needle magnetic mine
magnetic
magnetic inspection
magnetic chip detector
magnetic detection