Some exercise accounts in the annual are difficult to find in National Archives records. An annual and an archive may use different names for what appears to be the same exercise, particularly near the outbreak of war. Operational security is one possible explanation for divergent names, although the passage clearly labels this as a theory. That possibility requires careful comparison before treating an absent name as proof that the event did not occur.
Notable Point · 26:23-27:57
Exercise names and archival cross-checking
Annuals can preserve clues to naval exercises that are difficult to locate in official files, but names and descriptions must be cross-checked.