Slide-Sky-Disks With Grid Masks Showing Azimuths and Altitudes.
2.4K Views, 26 Favorites
Identifying Moderately Bright Navigational Stars.
916 Views, 3 Favorites
Slide Sky-Map for Displaying Tropical Stars.
869 Views, 1 Favorites
Detecting Counterfeit Currency, Australian Polymer Dollars.
3.6K Views, 15 Favorites
Detecting Counterfeit Currency, US Dollars.
3.5K Views, 7 Favorites
Measuring Angles and Distances for Outdoor Survival.
2.5K Views, 19 Favorites
Detecting Counterfeit Polymer Vietnamese Money
6.8K Views, 1 Favorites
Finding North and Time by Stars in the Tropics
1.4K Views, 8 Favorites
Finding North Direction and Time by Any Bright Star.
3.0K Views, 60 Favorites
Shadow Stick Navigation and Graph of Solar Paths.
5.8K Views, 105 Favorites
Selecting and Using Magnetic Compasses
8.6K Views, 108 Favorites
Mirror for Making Fire Using Sunlight.
11K Views, 60 Favorites
Finding Direction, Distance and Navigating to a Distant Base by Stars, P.2: Fine Reading of Latitude.
1.2K Views, 17 Favorites
Lighting Cigarettes and Making Fire With Sunlight
5.9K Views, 20 Favorites
Finding Direction, Distance and Navigating to a Distant Base by Stars.
1.9K Views, 31 Favorites
Finding Time to Sunrise With Star Maps
Finding Time to Sunset With Bare Hands
1.8K Views, 33 Favorites
​Finding North and Time With Unclear Sky
1.8K Views, 16 Favorites
Identifying Petroleum Spirits As Liquid Fuel for Lighters.
4.4K Views, 10 Favorites
Determining Local Magnetic Declination by a Magnetic Compass
1.1K Views, 16 Favorites
Cleaning Chewing Gum Stains on Clothes.
3.9K Views, 2 Favorites
Finding North Direction and Time by Stars
5.4K Views, 44 Favorites
Reshaping the Plastic Lense of a Cheap Compass
729 Views, 5 Favorites
Finding North Direction and Time Using the Moon P3- Moon Surface Features
2.2K Views, 12 Favorites
Finding North Direction and Time From the Moon, P2: Using Horn Line
1.3K Views, 16 Favorites
Caution in Finding North by Bi-sector Line
1.3K Views, 23 Favorites
Finding North Direction and Time From the Moon
5.6K Views, 30 Favorites
Locating the Sun by Polarizing Sunglasses.
2.4K Views, 9 Favorites
Beware of Perilous Flips by Magnetic Compasses
2.7K Views, 12 Favorites
Finding North Direction and Time From the Sun Using Bare Hands.
2.3K Views, 19 Favorites
Finding North With a Watch More Accurately P2
1.0K Views, 15 Favorites
Finding North With a Watch More Accurately
2.1K Views, 17 Favorites
