The Dark Angels have a Chapeter Attack Pattern called Sustained Suppression that allows actions (specifically pointed out to include moving and making attacks) while in Overwatch. This sounds good, but the description for Overwatch states that it takes a Full Action. It appears that it requires a Full Action each turn that Overwatch is to be maintained. Does Sustained Suppression reduce the action cost of Overwatch to a Free Action - thus actually making moving and attacking while maintaining Overwatch possible? Or are the movement and attacks that are possible only those triggered by other squad abilities?

I read it as a basically Overwatch is effectively free whilst in this mode.

Aye, I read it the same. It's a really nice ability.

Kind of reminds me of the Overwatch rule in 3rd Edition Space Hulk. It is a nice ability.