Interesting that no one has mentioned a sidearm. What about alligators and the like? .357 4" barrel revolver might be a useful addition. Being eaten would be an embarrassment to say the least.

The other point worth mentioning is that we are all assuming a certain degree of ability when it comes to map reading. If your new to the subject then you could do a lot worse than popping over to the Cammenga website and downloading the mapreading pdf file. It's the current U.S. Forces manual. It presumes that the person reading it has no previous knowledge of the subject.
Worth a read even if you know something about the subject. <img src="/images/graemlins/smile.gif" alt="" />