If I'm reading this correctly, then firing the FF bank you roll one die.  The 5-die entry is +0 AM, so -6 entry is 1 die.  You would not get to roll anything at long range without other modifiers.

See the combining/splitting rules in the Advanced Rules section.  You could, for instance, combine the FF and FP banks to get a -2 AM barring other modifiers.

That is one of the basis ideas.  I essentially took the parts of orders systems that I thought worked well and left those that were setting specific, overly invasive, or just not fun.

Also, solution for Damage Control:  Instead of making a single Command roll to activate Damage Control, make one in place of every repair roll.  A roll of 5+ will fix one grade of Thrust, Shields, etc.  A roll of 6+ fixes a system.

Also, another idea for an Order (which could be used as a normal rule by removing the Command roll):  Active Point Defense.  Immediately after making a Shield roll, you may opt to suffer one point of Shield damage and then make a Command roll.  On a success, you may reroll every failed Shield die once.

Although I'm buried in law school, I thought I'd rekindle this to say I'd be very interested.

I also think that certain ship traits, like the Leadership trait from Fleet Ops, could be reintegrated into the game at a fleet level.  That is to say, have "leadership" packages that can be applied to any ship (since Leadership likely wouldn't have an SU requirement).  It might also impact the fleet level for fleet coordination, although that's as far as my imagination can manage in the spaces between segments of oil and gas law.

Finding campaign-level uses for Auxiliary Services would also be good.  Cargo becomes more important when you are defending actual in-game trade routes, Repair and Hospital can offset ship damage between port stops, etc.  You might even have a system for ship capture - if a ship is brought down without taking out its entire hull (that is, by Marines or crew killers), that ship becomes property of whomever won the battle.

I think it deserves emphasis that fleet composition limits are essentially setting-specific.  If you're wanting something for "tournament play," then I think the rules balance themselves without the need for fleet limits.  For a lot of gameplay, limits on fleet composition depends entirely on the military you're simulating (be it real or fictional).

I think fleet design would be setting specific.  Thus, you'd have one fleet design system for B5, one for SFU, one for Starmada Universe (whatever you call it), etc.

If one were to import the campaign rules that were in the core/supplement set for Admiralty, you might be able to design such a thing by stating that a given force will have X composition per Y (in other words, if you have X unit on the fleet map, it will be composed of certain classes of vessels).

Depends on your reading, I suppose.  Each fighter and seeker marker technically counts as an individual vessel.  Also, it only counts as being in your own hex if it's face-up and targeting you.  So, one point of issue is that if the opponent's combat phase is after yours, you won't get the chance.  On the other hand, if you're flying massive vessels, being hit by a street-sweeper Proximity weapon might not matter to you much, especially compared to multiple Attack Dice of Seekers.

Also, the rules aren't specific about regeneration and system checks, but it would seem rather oppressive to make checks for being Damaged twice, especially since the second time might only require one point of damage.

I think that's the strongest argument for making it an option.  Inappropriate for some games, appropriate for others.

Nice!  Very detailed system, I rather like it.  However, it's very much a feature of naval battles (where accidental collisions are possible).  I'm looking for something dedicated more to space (actually, to large fantasy airships) where the ships take up little enough space in the hex that accidental collisions simply don't happen, and where ramming is a desperation tactic against a foe who's winning.

Following is a quick kitbash.  It ends up bearing only a little bit of resemblance to your system, but your system does guide mine.  The damage of this system is much higher than in yours.  Partly, this is because of the fact that ships have more "hit points" in Nova (thanks to Armor).  Partly, this is to simulate the "desperation move" element of ramming in space sci-fi.  Modifying it to reflect naval battles likely requires reducing the damage inflicted, and perhaps making the chance of collision higher (maybe by making the damage a function of the number of hits on the attack dice, which I do not do).

If you want to increase the damage (?!), then you can make the damage dice rolled equal to the full Hull Points of the other craft.  This would greatly favor bigger vessels, and mean rolling a metric butt ton of dice for damage in many cases.  If you want to reduce the damage, one option is to change the effect of Speed.  If it's a head-on collision, take the higher of the two Speeds as the damage bonus (rather than the total).  If it's a broadside collision, take the lower of the two.  If it's an aft collision, take the ramming ship's Speed minus the rammed ship's Speed, or the lower of the two Speeds, whichever produces a lower modifier.

One final note - the attack dice/damage dice system is intended to prevent having to make complicated calculations at the table, and at the same time make hits while ramming less probable.  There are probably better systems, and I'm open to suggestions.

Ramming

A ram can only occur on a phase in which the ramming ship ends the Movement Phase adjacent to the target ship, and the target ship is directly in front of the ramming ship, or in one of the "sideslip" hexes.  The ram itself occurs in the Combat Phase.  The ramming ship declares attacks normally, but as its final attack it may declare that it is ramming the target vessel.

Normally, roll one attack die (this doesn't determine damage, just whether the ship hits or not).  Roll an additional attack die if the Speed of the ramming ship is less than or equal to its Thrust (thus, it's in much more control of its maneuvers), and roll an additional die if the ship being rammed is moving at a lesser Speed than the ramming vessel.  The attack takes no modifiers for range.

Attack Modifier/+0/-1/-2/-3/-4/-5/-6
1 AD/1/1/1/0/0/0/0
2 AD/2/1/1/1/1/0/0
3 AD/3/2/2/1/1/1/0

If at least one attack die scores a hit, then the ship is rammed.  It makes no difference how many "hits" are scored.  Each ship must make Shield rolls against damage.  The base damage is equal to the Hull Points of the smaller vessel, modified by relative speed.  Thus, a 3 Hull Point vessel ramming a 9 Hull Point vessel does a base damage of 3 dice, but the same damage is inflicted the other way around.

If the ramming ship struck the fore of the craft (the FR hex face), then add the Speed of both crafts to damage.  If the ramming ship struck the side of the craft (the PP or SS hex faces), then add the Speed of the ramming craft.  If the ramming ship struck the aft of the craft (the AR hex face), then add the Speed of the ramming craft and subtract the Speed of the craft being rammed (this might turn into a negative modifier).

Example:  A ship with 5 Hull Points rams a vessel with 4 Hull Points, striking its aft (the AR hex face).  The ramming ship has 4 Thrust and is moving at a Speed of 6.  The ship being rammed is moving at a Speed of 4 and has ECM 1.  The ramming ship gets two base attack dice - one base, plus one for moving faster than the target vessel.  The total Attack Modifier is -1, so only one attack die is rolled.

If the attack hits, each ship suffers a base of 4 damage dice (for the lower Hull Point value), plus 6 for the ramming vessel's Speed, but minus 4 for the rammed vessel's Speed.  This comes out to a total of 6 damage dice, against which each must make Shield rolls.  This could easily gut both vessels.  If it was a head-on collision, it would inflict 14 damage and likely destroy both vessels.

Ram

This is a ship system that both augments the damage a ship inflicts while ramming and reduces the damage received.  Normally, Rams are mounted on the fore, but any hex face might receive a Ram (so as to defend against side swipes).  A ship might even get multiple Rams to account for multiple hex faces.  Each Ram takes up SU equal to half the Defense Factor of the vessel, and increases ORAT by the ship's Thrust Factor.

If a ship rams or receives a ram on the hex face protected and the opponent does not have a ram on that side, the ship will inflict more damage and sustain less.  For the ship with the Ram, rolls of 3 or 5 on the Shield roll inflict no damage.  For the ship without the Ram, rolls of 3 or 5 will inflict damage.  If both ships have Rams facing the correct direction, they cancel.

It depends on how it applies.  Does Point Defense work instead of Countermeasures?  In that case it sounds like a null-value Trait (rather like Fire Linked).  If Point Defense works in addition to Countermeasures, then it's a disadvantage and should be costed below x1.

As an addendum to the above:  It occurs to me I wrote this for a specific setting, and a few variables might be desired.  For those people wanting to make it a little harder to kill a planet without taking away the option entirely, a few possibilities.

Increase Hull Points:  This is one solution, but might not be favored since the numbers will get quite large (you're already looking at 120 Hull Points for the largest planets).

Give Them Shields:  This will reduce the effect of Increased IMP (which would otherwise make an excellent Trait for planet killers, especially alongside things like Catastrophic, Continuing Damage, and Extra Hull Damage).  However, this doesn't map very well to what I tend to envision Shields as being.

Improved Armor:  Instead of the normal damage system, make them only take damage on damage rolls of 1.  This will cut the amount of damage they suffer in half unless the weapon has Extra Hull Damage, but still map well to things like Continuing Damage.

In a similar question, has anybody postulated any rules for terrain destruction?  I figure with all the Star Wars stuff out there, somebody must've posted something on it, but as we've probably already learned, my search-fu is weak.