Today's WRUW, 2 persons showcased the Casio MTF-E002 and E003. Both have movable inner ring with directional markings. I was wondering how that works, since it's not in the Casio manual. Turned out to be the oldest trick in the book to find direction, which I happened to not know. Learn something new everyday!
The basic rules to remember are:
A. In the Northern Hemisphere of the Earth, the Sun rises from East and sets to West, at noon it's due South.
B. In the Southern Hemisphere of the Earth, the Sun rises also from East and sets to West, but at noon it's due North.
The link below is a near perfect illustration of how to do it. Just need to add 2 more instructions:
1) At noon, when your hour hand is pointing at 12, you don't need to do bisecting. 12 o'clock is South for Northern
Hemisphere, and North for Southern Hemisphere.
2) For Daylight Saving Time, you need to use 1 o'clock as the reference instead of 12.
Other than those, follow the rest of the instructions in the link.
How to Find Direction Using a Watch: 8 Steps (with Pictures)
Here's the same video in the link. The guy happened to have an old AWG100.