View source for ISC: Plasma I and other refits

=== ISC Plasma-I adjustments ===

The ISC's defensive plasma-I don't work the same as in SFB: only 1 plasma-I can be fired towards capital ships per turn, for all launchers. In OP patch 25412, this is for each group mount of Plasma-I, so more plasma can be lobbed at the enemy.

Glancing at Taldren 'readme's concerning the changes done, I've found that the BPV adjustment is roughly based on the following calculation: 

BPV added = (# plasma-I) * 1.5

Additionally, SFB's ISC SSDs show the ISC with the plasma-F installed only. Calculations are needed to figure out each prior refit. 


=== previous ISC refits ===

All below are based on the SFB's version of ship's BPV and SSD, noted in reverse to demonstrate the downgrade path

* Z refitted ship cost: base SFB BPV + (#plasma-I * 1.5)
* Y refitted ship cost: approx: base SFB BPV - (#plasma-I * 3)
** 2 plasma-I removed: -7 BPV
** 4 plasma-I removed: -13 BPV
** 6 plasma-I removed: -20 BPV
** 8 plasma-I removed: -26 BPV
** 12 plasma-I removed: -31 BPV 
* P refitted ship cost: Y-refitted ship + -4.5 BPV * Plasma-S
** Plasma-S downgraded to Plasma-G.
* W refitted ship cost: P-refitted ship + (-4 BPV * PPDs removed).
** PPDs removed.
* basic design, no refit: W-refitted ship + (-1 BPV * ph-3s removed). 
** ph-3 removed.


The years for the refits are also important. I'll just use Taldren's dates. If the ship post-dates any refit date, the refit will be included in the base design of this ship.

* W refit in YFA +2 (2265)
* P refit in YFA +5 (2268)
* Y refit in YFA +7 (2270)
* Z refit in YFA +16 (2279) 


=== ISC X ships ===

ISC X1 x-ships also need to be adjusted for the above. Additionally, they need to be compensated for the Plasma-L -> Plasma-I downgrade. There really isn't any precedence to this, so I used common sense:

Normally, a plasma-F launcher costs 6 BPV (based on Gorn F refits). In the case of the ISC, it's only about 3 BPV per Plasma-I launcher. That's only half-price. Comparing the Orion option costs for both the Plasma-F and the Plasma-L, there's a difference of 2 BPV. This suggests the downgrade should reduce the BPV by 1 per plasma-I launcher. (2/2) 

Thus the x-ship's BPV is increased by #plasma-I * 0.5.   ''(instead of * 1.5 BPV)''