Activity for jpa‭

Type	On...	Excerpt	Status	Date
Answer	—	A: What is the use case for non-breathable waterproof pants? Non-breathable waterproof garments are basically polyurethane plastic at the surface. This has one very big benefit in that dirt doesn't stick to it much, and what sticks will usually come off with just water. So they're good for uses such as: Trekking in muddy conditions. Just hang them overnight... (more)	—	almost 5 years ago
Answer	—	A: How do you know you have reached North or South Pole without GPS? I'll expand a bit on how one would use a sextant to locate the north or south pole. The basic arrangement needs a horizontal reflective plane, for which Amundsen used a pool of mercury. A precisely weighted mirror could work also, but a pool of mercury is more robust and doesn't go out of calibratio... (more)	—	over 5 years ago
Answer	—	A: How can I get a GPS location for this tree on a distant hillside? OpenStreetMap wiki describes a technique called aimed straight segments. You need a GPS device or app that can record a trace and show it on the map. Start from a location where you can see the tree from. Choose some object that appears directly downwards from the tree, it could be e.g. a mailbox ... (more)	—	about 6 years ago