Dave, or "Phineas" or "Tolstoy" or,
Can you play a combat card and then after the dice roll an interrupt card? Or is the limit of one card per combat including interrupts?
I do not think so. From the FAQ:
Fleet Captains FAQ pg 5 wrote:
Q. Can an interrupt card be played in addition to a non-interrupt card during an opposed test?
A. No. Only 1 Command card may be played from your hand during a test, the Interrupt ability allows for the card to be played in more situations - not as an additional card.
Fleet Captains FAQ pg 7 wrote:
Q. I don’t know why some cards are labeled Interrupt?
A. Some Interrupt cards are very useful to be played on your opponent’s turn, while for others the Interrupt label is describing that the card can be used for more than one type of event (moving or a systems test or a particular encounter etc). It also allows more design space for possible future expansions. So, an Interrupt, unless it says something like Interrupt (active player), is a non-conditional Ops card. You can't play them on Combat tests but if you had an Encounter that had a Weapons or Shields test (and doesn't say it was Combat), you could play it as your single command card.