R G Grant
R G Grant is a historian who has published some 20 books for adults, as well as writing numerous children’s history titles and contributing to many multi-author works. His best-sellers include Flight: 100 Years of Aviation and World War I: The Definitive Visual Guide. His most recent work was the highly praised Sentinels of the Sea: A Miscellany of Lighthouses Past (2018), an illustrated history of lighthouses.See titles by R G Grant
The 133-m-tall (436-ft) Jeddah Port Control Tower in Saudi Arabia, although not primarily built to aid navigation, is listed by The National Geospatial Intelligence Agency’s “List of Lights” and surpasses in structural height any other traditional and non-traditional lighthouses in active use. The concrete and steel tower was built in 1990 and has a focal height of 137 m (450 ft); it produces three white flashes every 20 seconds.