Dead Reckoning

Re:UP from a Last Known Checkpoint (or Ancestor, if you prefer).
Begins as a single-sided Argument, that may be like a Bluff (if you know how to Lean, or Stretch out a Moment). 
Has much to do with "Vessels". 
There is a Method involved. 
May be useful to practice in spare moments, ...so that One might recognise the truth behind "Unfamiliar Scenery," or Circumstances. 
Seems to have incidence with the term "backcalculation".
Category:The Knowledge
Category:Meta