Camo System

The Camo system is a form of visual concealment used to make it harder to hit the unit. It is designed to make the surface of the unit match it's surroundings. This is more effective when the unit is moving slowly as the system takes time to adjust to new settings. In game terms attacks against a unit mounting a camo system receive a to-hit modifier based on the number of hexes moved by the target unit in the same turn as the attack: +2 for 0 hexes moved, +1 for 1 hex moved and no modifier for 2+ hexes. It also reduces the range a unit can be visually spotted by half.

References

Total Warfare p. 228

Tactical Operations p. 221