SWING O METER

[ELECTRIC AND ELECTRONIC NAVIGATING DEVICES COMPRISED OF (1) GYRO-POWER SUPPLY UNIT OR UNITS, (2) MAIN INDICATOR] CONTROL UNIT OR UNITS, (3) AUXILIARY INDICATOR UNIT OR UNITS, AND (4) EXTERNAL RESISTOR UNIT OR UNITS, ALL SUITABLY AND EFFECTIVELY INTERRELATED, OTHER COMPONENTS, REPAIR PARTS AS WELL AS ACCESSORIES FOR SUCH GOODS