OOC
Naryss is perfectly capable of manning a weapons console, too. He just doesn't have the Focus(es) to be a rock star at it.
You roll 2d20, wanting low. Your target number is (for weapons) Control + Security, or 13 or less. Each die you roll that meets or goes lower than 13 is a success. Each '1' counts as 2 successes, or, if you have an applicable Focus, your skill would be the Crit threshold. So if you had "Starship Weaponry" as a focus, you'd crit on a 5 or less instead of a 1 (5 being your security rating). Crits count as TWO successes instead of 1.
As for Momentum, it's a group pool. Anyone can take from it or add to it. The cap is 6, but you can do an "Immediate Spend" if you earn more and are at cap in many cases.