# Thickness of armour

The value is the sum of the thicknesses of 1st and 2nd armour layer weighted by the number of wires in case of wired armour.

Symbol
$t_{ar}$
Unit
mm
Formulae
 $\frac{t_{a,1} n_{a,1}+t_{a,2} n_{a,2}}{n_{ar}}$ wires $t_{a,1}+t_{a,2}$ TECK or steel tapes
Used in
$GMR_{ar}$
$H_1$
$H_2$
$H_3$
$p_{ar}$