Defense Issue

[Tals]

In a non fortified square does defense have any additional value over say Patrol and if a unit is searching for magic sites is that the same effect as being on defense.

I ask the question because I am awaiting an attack and whilst I wait it would appear to be worthwhile searching for magic sites, patrolling,building etc - however ultimately the main aim is to defend and I don't want to detract from that. So does doing any other instruction detract from defense.

Tals