Yah. Lucas is the guru, but he cannot physically sail to all places to see the changes every year, so he relies on notices to mariners and other peoples second hand advice.
When my gang of friends were 'plotting' my progress, they were using Lucas' guide to see for example where Morris Island was ( when I radioed in)
Knights book has suffered a similar fate. If you look at some of the charts, they were first surveyed in 1880, and addended by aerial recon in 1945. Things are different now eg WGS84.
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