He motivated himself to learn the traverse table and the method of determining latitude.
2.
Access was via the existing traversing table.
3.
The toleta de marteloio is ancestral to the modern " traverse table " used in more modern navigation.
4.
Locomotives could be put into the Factory roads by means of a traversing table at the East ( Exeter and London ) end.
5.
Traverse tables use three values for each of the crooked course segments the " Distance " ( Dist . ), " Difference of Latitude " ( D . Lat ., movement along N S axis ) and the " Departure " ( Dep ., movement along E W axis ), the latter two calculated by the formulas: