Simple typographical errors were corrected.
Ambiguous hyphens at the ends of lines were retained.
Index entries were not checked for proper alphabetization or correct page references. They were not systematically compared with their spellings on the pages they reference, but when differences were found, the Index entries were changed to match the references.
In the Index, ships’ names were printed in italics and all other entries were printed in boldface. To improve readability in this eBook, the boldface entries are shown in normal weight.
Page [27]: “walrusses” was printed that way.
Page [33]: “Haïti” was printed that way; in the Index, it is printed as “Häiti”.
Page [149]: Closing quotation mark added after “command in the Mediterranean.”
Page [246]: “court-martialed” originally was printed as “court-marshalled”.