The Inertial Bubble is a ship sized defense.  The psionicist creates a
barrier around her vessel (it is physically located at the edge of the air
envelope).  Like the less advanced devotion, the bubble helps protect from the
following.
    Any Non-Magical missile weapon.
    Any physical missile which was created with magic.
    Any missile with magical pluses.
    Flames. Especially useful in the Phlogiston.
    Gas. Prevents foul air from pervading the ships envelope, however
        after 2 rounds these effects are ignored.
    Crashing.  Aids a vessel being rammed by halving damage and preventing
        ship shaken critical hits.

    The Inertial Bubble can not protect from the following
    Missiles made entirely of magic.
    Heat or cold.  Thus the Bubble shields from greek fire but NOT
        close proximity to a fire body
    Pure energy or light.
    Gaze attacks.

    The Inertial Bubble is a much more powerful version of the Inertial Barrier.
If a missile manages to hit a target within, the attacker rolls damage normally,
then the defender rolls the same type of die (with +2 bonus) to see how much damage
the Bubble deflected.  Besides the +2, no other bonuses apply to the defenders roll
(magic pluses, etc)
    Then the defender subtracts her die from the attacker and whatevers left is
damage done.  If no damage is done, the missile falls to the deck.  The bubble does
not shield from explosive damage.  One advantage over the Inertial Barrier is that
the Inertial Bubble is only one way, attackers are penalized, but defenders may
fire without penalty.
    Power Score--The bubble can be maintains as if the ship were half the size.
    20--For 1-4 rounds the bubble is inverted and attackers have no penalties
while defenders do.  If the psionicist maintains the power during this time, at the
end of 1-4 rounds she fixes the problem and the power works normally.