Greenwich Mean Time became the standard time reference for global shipping.

Evidence

By the middle of the nineteenth century it was established that all British shipping would take Greenwich as its point of reference for time and therefore for longitude, and all the oceans of the world had been mapped by British ships on that basis. — Neil MacGregor, A History of the World in 100 Objects, 1398

Categorization

• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 1398
• XREF: connects to: The establishment of Greenwich Mean Time unified global timekeeping practices. — Neil MacGregor, A History of the World in 100 Objects, 1398; The telegraph enabled temporal coordination that made standard time zones possible — James W. Carey, Communication as Culture- Essays on…, 857; Standard time in the United States is a recent invention from 1883 — James W. Carey, Communication as Culture- Essays on…, 843 (+1 more)

Library Connections

• The establishment of Greenwich Mean Time unified global timekeeping practices. #expands (0.85) — Neil MacGregor, A History of the World in 100 Objects, 1398