Partial Cloak

Ship Special Rule
A ship with the Partial Cloak special rule can only ever receive a Minor Spike, it may never be increased to a Major Spike. If a rule or weapon would cause this ship to gain a Major Spike, it instead gains a Minor Spike (or nothing at all if it already has a Minor Spike).

This rule only applies while the ship is still uncrippled, so once it loses 50%+ of its Hull this rule no longer applies.