How to do such training on the actual battlefield? Maybe with this baby:
http://laptops.reviewed.com/features/the-toughest-laptops-on-earthIn the above article, you can also find a computer that is
"the ultimate in ruggedness and reliability, ... offers extreme performance. While the user interface needs a bit of work, and we noticed some memory issues, nothing beats this device when it comes to longevity. Capable of surviving 1,000-foot drops and long-term underwater submersion":