Urban Exploring is risky business.
Inside abandoned buildings, bunkers, mines or tunnels, there are many dangers lurking that make an adequate security equipment at least as important as the camera equipment - if not more important!
The camera equipment doesn't get you home in one piece, but the right safety equipment does.
So, here you will find an overview of what I am frequently carrying with me and for what purposes.
But remember: Even the best equipment cannot substitute a good measure of good judgement and common sense. If you are not sure about the safety in a location - don't go in there!
When you're not sure if a floor will hold your weight - don't step on it!
One of the most important things is: Never go alone! If you do, make sure that someone knows where you are and when you expect to be back or at least when you'll be reporting back. And if you are not, that person must call the authorities to get you out of the mess you've gotten yourself into!
I don't mean to lecture here, but as with all dangerous hobbies, the motto "Safety first" applies here in particular