Nav
Closing angle as Beagle refers has rules of thumb that may be applied effectively without the need of inverse fraction mental arithmetic calculations as sometimes taught.
However, regain track is my prefered method for students and myself. Don't understand how 'fashion' comes into it.
Send Clowns makes a point which I agree with. Nothing to gain by halfway, quarter way pinpoints or military time marks if there isn't a suitable number of distinctive features to ensure that is in fact where you are. I teach that the pinpoint must be abeam a distinctive group of features (preferably 3) whether or not it is halfway or whatever. It is easy enough to premark the point at which you will regain your track, following in flight track error correction using the double error rule to achieve the Isosceles triangle drawn ( ten degree fan lines abeam the pinpoint with a small cross where track will be regained) during the pre-flight planning stage.