If an enemy ship gets in base contact with
a Tyranid vessel it will suffer spore impacts, a
blast marker is placed in contact with the two
ships’ bases before any other effects are
calculated (effectively knocking down one spore
shield on the Tyranid ship.) Unshielded vessels
(including those only protected by holofields)
suffer an automatic hit instead (ie, don’t roll a
dice), the spore automatically causes one hit
(with the normal chance of critical damage).
PG 85 Armada. Simply stated, anytime a ship comes into base contact it suffers a spore impact (BM).
Spore impacts from moving in base contact with
Tyranid vessels effect enemy ship movement,
meaning enemy vessels lose -5cm speed and ships
with zero shields (such as Eldar and ships with
Shields Collapsed critical damage) have to roll a D6
against receiving damage on a 6. However, this test
(if required) only needs to be done once per
movement phase, regardless of how many Tyranid
ships make base contact. The ship only counts as
having blast markers in base contact if it ends its
movement in base contact with a Tyranid vessel.
FAQ2010 PG 29 This covers when an enemy moves into contact with a Tyranid ship in more detail.
Feeders could probably use a notation that they ignore shields, currently they go off the assumption that if they didnt they would be pretty worthless
![Tongue :P](http://www.specialist-arms.com/forum/Smileys/default/tongue.gif)
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