INTERNATIONAL CIVIL AVIATION ORGANIZATION INTERNATIONAL STANDARDS ANDCMNDED PFt.TICES METEOROLOGY --I TO THE COMTENTION -WINTERNATIONAL CIVIL AVIATION Fourth Edition - January 1.956 as amended by Amendment 42 ERRATUM plicable to the English and Spanish texts only A'wment B, page 30 .L Para.4.1, Item 2 - 2 mend to read aa followe "2 three or more position lines, or positive fixt1 - END -