She was riding quietly at anchor, a perfect picture of nautical beauty.
"Due North or Glimpses of Scandinavia and Russia"
Maturin M. Ballou
Now you have already learned that a minute of latitude is always equal to a nautical mile.
"Lectures in Navigation"
Ernest Gallaudet Draper
Only on the equator is a minute of longitude and a nautical mile of the same length.
"Lectures in Navigation"
Ernest Gallaudet Draper