Just a minor point, but...
I've seen the phrase spelt both Ded Reckoning, without the "a", and Dead Reckoning, with the "a". The latter is more common, but I've never found an explaination for where the phrase comes from. However, I have heard an explaination for the less-common Ded Reckoning spelling, which is why I believe that this one is correct.
The phrase Ded Reckoning is short for "Deduced reckoning", because you deduce your heading and timings from other information, such as desired track, airspeed and forecast or calculated wind. Thus, Ded Reckoning, in it's true form, does not require you to look out the window to navigate. (Of course, you have to look out the window to set your attitude and look for traffic if you're in VMC.)
So those replies which have said that what we're taught is a combination of Ded Reckoning and Pilotage are completely correct, since looking out the window and confirming your ded reckoning by identifying ground features is a form of pilotage, and is not ded reckoning.
FFF
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