Field engineers, those in 30SCE build fixed bridges, more for
supply lines, also prepare ground for initial assault as support
unit for RCO. The key players in RCO are the Amphibious engineers,
like those in 35SCE, they build floating bridges, rafts for the
initial assault across rivers which the armour engineer cannot
cope. Field engineer and amphibious engineer support all units in
the division. The armour engineers are part of the armour unit,
takes care of the armour unit only and they are supposed to be way
ahead of Field engineer and amphibious engineers, in the front
line.
Normally, armour engineers support armour units in assault river
crossing under enemy fire. amphibious engineers support armour and
infantry in assault river crossing under cover of darkness, even
then the infantry guys should have landed on the far side to
protect the far bank. Field engineers do not build fixed bridges
under enemy fire.