Reference "charts".....modern RN and RFA ships do not use paper charts as us of another generation did.
In those days the Navigators life was almost totally consumed by the chore of doing the myriad of "chart corrections" by hand and with a "mapping pen".
Then the great revolution came, and "corrections" came printed on little squares of tracing paper. Still had to use a tiny pen, although locating where the correction was to be made was much easier.
Considering that a "Full World Wide Folio" of charts can run into well over 5,000 charts...start to see a problem? An instance....a small change to a chart off the Tyne. The correction will have to be done on the main North Sea Chart, then also on the chart showing just the NE Coast, then again on the chart showing the "approaches" to the Tyne. In some cases this single correction would have to be done on perhaps 8 different charts.
Look....this is too large a subject to cover in a simple answer, I could write an essay on this subject ( which could be a bit of an eye-opener" to some).
But nowadays the charts are "electronic", and are corrected by simply downloading the new issues.
I refuse to believe that such a system is not used on our latest submarines. "Updates" are automatic. No excuse, no drama.
.......If you want such an essay from me, just plead a little! BY.