1. Photon Flash grenades.

So one of my dashing players has chosen to cover behind a conversion field in combat. Which is all well and good. Up until the time when the Orc choppa hit the shield with enough force to trigger the photon flash effect. While in the middle of a swirling melee.

Which is all well and good, except for the fact that that photon-flash grenades don't seem to have and area of effect or duration listed. Has anyone managed to find where they have hidden this obscure piece of knowledge, as I know it will come up again.

2. What is the maximum speed of a starship in combat. I thought it was the listed speed, but then adjust speed makes a comment about not being able to move faster than double the speed rating on the ship. So which is it, The speed value, or twice the speed value.

1. From the Dark Heresy Core Rulebook: Photon flash grenades detonate like a small star, blinding anyone nearby and bright enough to overload cheap or primitive vision protection systems. Anyone within 15 metres of a photo flash grenade when it detonates must succeed on a Toughness Test or be blinded for 1d5 Rounds.

2. Adjust Speed , by RAW, allows the ship to move up to 1 less than double it's Speed Value. Flank Speed allows you to exceed this. Without performing any Maneuver Actions, the fastest you can travel is your Speed Value.

don't forget the navigator power: "stack the deck" which can potentially add a ridiculous amount of speed to a ship (even triple it for the slower ones).