Question 1

At meridian passage with the sun due SOUTH of you, latitude =

Accepted Answer

Zenith distance (90° − Ho) + declination — ZD is your distance from the sun’s GP, all of it north–south at transit. Sun north of you instead: lat = dec − ZD.

Question 2

You know noon has arrived when…

Accepted Answer

The sun stops rising in the sextant — it “hangs” — Track the sun up with the micrometer; the moment it stops climbing IS local apparent noon — and its UT time is a rough longitude.

Noon — the navigator’s appointment

This lesson is part of a paid course