Survival Skills: Build a Perimeter Alarm for Your Camp
Ever wake in the morning while in the wild and wonder if man or beast has wandered into your camp late at night while you slept? With a simple alarm system, you may be able to rest a little easier. You won't find the professional version of this contraption at your local sporting goods store, but if you travel the far north, you'll find places that sell trip wire flares. These flares are used in remote camps to warn of polar bear and grizzly bear incursions.