Great review. I'm always curious about why people want to use a knife as a spear though. I'd just sharpen a stick and fire harden the tip. Pretty much as effective as a blade on the end and much better balanced. A big plus is you still have your knife for chores or emergencies without having to dismantle the spear every time.
If I'm missing an important aspect of using a knife as a spear, please let me know. I'm not picking on you, this has always made me curious and this just seemed like an opportunity to ask.
I agree with you, my first choice would be to fire harden the tip and save the knife. However, what happens when you're in a situation where you cannot fire harden the tip? This could be because of excessive rain fall, or you just got into the survival situation and your first order of business in the need for a weapon for protection, being stalked by a bear or some such thing.
You can also lash the knife to the end of a stick and use it to prune. I've done this before to cut down wasp nest. But it could also be used for bees nest if you want to get at the honey.
It's important to kepp in mind that survival is all about opportunities and options. The more you have the better you are.
