I have a question about the rules concerning the usage of psychic powers. Specifically I don't know if a psyker must be able to talk in order to manifest a psychic power.

Example: Dallas, a psyker, is gagged and handcuffed in a hideout of heretics. So while he is there, he wants to manifest a psychic power.

Should he be allowed to do it, or not? I'm especially concerned because there is no rule about the need of vocalisation or gesture (except for sorcery). Of course it's obvious that a psyker who can't move himself also can't touch himself. Any ideas?

To me it's a Mental Power, so unless the room is warded. Why wouldn't he be allowed it?

All casting processes goes inside psyker's head. There is nor vocal, nither somatic componet in manifesting powers. But if your psyker always do/say something during manifesting, you may apply some penalty, becouse it is new and unusual for him to manifest without helping phrases.

Manifesting is like counting; it's much easier if you use your fingers, but by no means is it impossible to do so without if you have some practise.

First of all: Thank you all for your answers. The reason I was quite puzzled because of this matter is that a psyker could actually summon death and destruction in form of fire bolts although he is completly immobile. Since I think this makes a psyker obviously harder to arrest/tame I wanted to make sure.

Thats why the Black Ships are specifically build for the purpose of "inactivating" Psykers from the ground up.

Best bet for catching psykers on-the-fly is keeping them unconciess all the time. With no secound where they are awake. Ever.

There are some gear in game, what could be helpful in purporses of capturing and disabling psykers. Like drug Torpor (IH) and Psy Dumper, able to nullify psy power in certain area. And dont forget Untouchables =)

I would say that blinding a psyker (with a blindfold for example) would help a lot with some kinds of powers.

Umbranus said:

Unless he's an Astropath!

You don't capture Astroparths, if they're not un your side, you kill them as fast and hard as possible.