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navigators
Papua New Guinea - New Britain - New Ireland - Cape St George to Rabaul 1:150 000
direction of the measured field is parallel with the instrument pointer and magnitude in gauss
this edition includes all the original subjects while expanding discussions of new gear
Australia - East Coast - New South Wales - Broken Bay 1:40 000
Magnetometer 25/1-0-1 Gauss Handheld Lorengau Bay navigatorsPOCKET MAGNETOMETERS DUAL PURPOSE, TWO COLOR SCALE makes the Model 25 Magnetometer more useful. The upper Black scale (the one more usually used) reads directly in gauss of a uniform magnetic field oriented parallel with the centerline of the instrument scale. The lower Red scale is used in determining the magnitude and direction of an unknown magnetic field by merely orienting the instrument for maximum reading. When shown in the Red scale, at such a
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