In a game I am currently playing, I am attempting to avoid using missiles because I found it boring to follow the same pattern every time.
To that end, I have a civilization who's ship designs are centered around Railguns. The issue I have run into, which I was not expecting, is related to Final Defensive Fire with the railguns against incoming missiles.
All of my ships have some point defense but I was expecting that by having the 10 cm Railguns and their respective Fire controls set at Final Defensive Fire (10k km) that they would shoot at anything that was going to hit. However, when I have closed to within my firing range (20K km) and engaged the enemy, when they launch missiles they all hit immediately and nothing but the single CIWS turret fires on the incoming missiles. The missiles I have been fighting against have a speed of ~25,000 km.
Am I missing something in my setup in order to get my railguns to fire defensively?
-I have 2 railguns assigned to each firecontrol.
-There is more power than needed for the weapons on the ship.
-The firecontrols are set to Final Defensive Fire (20,000 KM)
-The firecontrols are set to open fire.
Below is the Frigate class ship I was using for point defense of the fleet. I have attached a screen shot of the firecontrol settings for the ship class.
Firefly class Frigate 5,000 tons 490 Crew 1118.4 BP TCS 100 TH 330 EM 0
4400 km/s Armour 5-26 Shields 0-0 Sensors 8/1/0/0 Damage Control Rating 2 PPV 20
Maint Life 2.93 Years MSP 280 AFR 100% IFR 1.4% 1YR 48 5YR 725 Max Repair 120 MSP
Magneto-plasma Drive E8.4 (5) Power 88 Fuel Use 84% Signature 66 Armour 0 Exp 10%
Fuel Capacity 200,000 Litres Range 85.7 billion km (225 days at full power)
CIWS-160 (1x4) Range 1000 km TS: 16000 km/s ROF 5 Base 50% To Hit
10cm Railgun 40K-5 (4x4) Range 40,000km TS: 4400 km/s Power 3-3 RM 4 ROF 5 1 1 1 1 0 0 0 0 0 0
25cm C4 Plasma Carronade (1) Range 160,000km TS: 4400 km/s Power 16-4 RM 1 ROF 20 16 8 5 4 3 2 2 2 1 1
Fire Control 160K-5000 (3) Max Range: 320,000 km TS: 5000 km/s 97 94 91 88 84 81 78 75 72 69
Stellarator Fusion Reactor Technology PB-1 (3) Total Power Output 18 Armour 0 Exp 5%
Navigation Sensor (1) GPS 1600 Range 12.8m km Resolution 100
Anti-Missile Active Search Sensor (1) GPS 32 Range 2.6m km Resolution 1
Thermal Sensor TH1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
This design is classed as a Military Vessel for maintenance purposes