Slag
IO540, What mad_bear is descrbing is called pilotage, not dead reckoning. Learn your stuff before you slag it off.
mad_bear. Pick things you can see from a distance. Pick things you cannot easily mistake for something else. Don't pick things where there are two of them close together. When picking landmarks, plan so you can see your next but one landmark before you get to the next landmark. Pick landmarks where two lines cross eg motorway intersections. Quite simple really.
You don't miss one chance to take the mick out of stuff I write. Not sure why; I don't think we have met and I refused to buy you a beer, etc. Why don't you forget the slagging off and spend the time saved typing a worthwhile contribution to knowledge.
In this case, you take the mick and then go on to paraphrase half the stuff I wrote.