They allowed sailors to go on longer voyages plus they help navigators map the coastlines.
We shall overcome is the answer
The writers of the Constitution gave federal judges job security because they wanted to be able to decide cases free from public or political pressure and for federal judges can know their jobs are safe even if they make unpopular decisions
they can only be removed by inpeachment
The American Federation of Labor (AFL) was a national federation of labor unions in the United States founded in Columbus, Ohio, in December 1886 by an alliance of craft unions disaffected from the Knights of Labor, a national labor association. Samuel Gompers of the Cigar Makers' International Union was elected president at its founding convention and reelected every year, except one, until his death in 1924. The AFL was the largest union grouping in the United States for the first half of the 20th century, even after the creation of the Congress of Industrial Organizations (CIO) by unions which were expelled by the AFL in 1935 over its opposition to industrial unionism. The Federation was founded and dominated by craft unions throughout its first fifty years, after which many craft union affiliates turned to organizing on an industrial union basis to meet the challenge from the Congress of Industrial Organizations (CIO) in the 1940s.
