Not sure if this is in the right section, but in each of the IN segmentum fleet lists, it mentions the following note:
Imperial capital ships with 6+ prow Armour that mount a prow ram may upgrade it for a Power Ram that imparts a +1HP damage in addition to any other hits rolled when ramming for +5 pts.
Maybe I am misreading this rule, but I interpret it as if when upgrading a 6+ prow armor capitol ship to have a prow ram, you may then upgrade that to a power ram for 5 points.
If this is correct, where is the rules for a prow ram?