
303Trajectories
latest tank cannon and re control systems now in use. It is nevertheless instructive to
show the error sources considered in a stationary-to stationary engagement of a tank to a
vertical 2.3 × 2.3 m target. Such computations are now carried out on computer programs
similar to those shown in [6].
Some error sources are tabulated in Tables 8.1 and 8.2 [5].
As can be seen from Tables 8.1 and 8.2 there are many error sources that affect PFRH in
a quasi-combat situation. Some of these require explanation. For example:
Zeroing: The weapon is zeroed by ring a small group usually at 1200 m range, in a non-
combat situation, recording the ...