Approximately how far apart are two parallels of latitude separated by one degree?

One degree of latitude is approximately **60 nautical miles**, because a minute of latitude is approximately one nautical mile. The distance is measured north–south along a meridian. The other choices confuse degrees with minutes, or give the approximate kilometre value rather than nautical miles.\n\n**Key takeaway:** Use $1^\circ$ latitude $\approx 60$ NM.\n\n**Glossary:** **Meridian**: a line of longitude; **NM**: nautical mile.