I'm going to try and give some german translations, too.
- The railgun is pretty much untranslated. You could try 'Schienenkanone', with which I would be very, very unhappy because I most certainly wouldn't know what that is... Alternatively, how about calling it simply 'Bordkanone', most closely translated to 'ship cannon'? That seems to be the current german nomenclature. More exactly, the nomenclature seems to be '[Calibre]/[Length in calibre multiples]', so maybe a "Bordkanone 100/100', for a railgun of the length ten meter with a calibre of 10cm? The length in calibres can be gotten from the railgun launch velocity, multiplied by 100, for example. So, the Scharnhorst's railgun would be the 'Bordkanone 100/400', while the bigger Königsberg's would be the 'Bordkanone 200/400'. Or, to differentiate between weapons, the 'Bordkanone(k)', with (k) standing for 'Kinetisch', that is kinetic.
- 'Feuerleitsystem' or 'Feuerleitcomputer' standing for 'Fire control system' and (would you guess it?) 'Fire control computer' would both work.
- For a missile nomenclature, see later.
- For engines, both would work, though I'd say 'Ionenantrieb' works better as the principle, while 'Ionentriebwerk' works as the actual engine.
- Alternatively, for active sensors, you could simply take RADAR/Radar.
Now, for missiles... As far as I see it, there are two possible translations:
a) Unguided missile (aka rocket in english): Best translation's probably 'Rakete'.
b) Guided missile (aka uhm... missile in english): Best translation's probably 'Lenkflugkörper' (closer to cruise missile), abbreviated LFK.
So, you've got the following possibilities:
ASM: 'Antischiffsrakete' would be more for an unguided missile, while 'Lenkflugkörper' or 'Raumzielflugkörper' (something like 'Space target cruise missile') for guided ones. I'd go with Lenkflugkörper, with an LFK in the missile's name, for example LFK-1 or something.
AMM: 'Anti-Raketen-Rakete' is the closes translation (with ARR as abbreviation), but I'd go with 'Abwehrrakete' ('Defense rocket') for better readability.
Drone: 'Drohne'. Plus, for Recon Drone, you can use 'Aufklärungsdrone'.
Buoy: 'Boje'., or for sensor buoy 'Sensorboje'.
Mine: 'Mine', or Raummine for 'Space mine'.
I hope i covered the essentials and if some fellow Germans with some military background read this ... dont hit me Tongue
I second that... and, funnily, because most of my armchair military knowledge stems from english sources, I have to research that myself...
Scharnhorst class Missile Cruiser 12,000 tons 311 Crew 1734.6 BP TCS 240 TH 960 EM 0
4000 km/s Armour 5-46 Shields 0-0 Sensors 1/15/0/0 Damage Control Rating 5 PPV 49
Maint Life 1.91 Years MSP 452 AFR 230% IFR 3.2% 1YR 160 5YR 2404 Max Repair 120 MSP
Intended Deployment Time: 12 months Spare Berths 1
Magazine 540
MTU Friedrichshafen V240 Ionentriebwerk (4) Power 240 Fuel Use 56% Signature 240 Exp 10%
Fuel Capacity 600,000 Litres Range 16.1 billion km (46 days at full power)
Rheinmetall Bordkanone(k) 100/400 (3x4) Range 40,000km TS: 4000 km/s Power 3-3 RM 4 ROF 5
ATLAS-96 Bordkanonenfeuerleitsystem (1) Max Range: 96,000 km TS: 4000 km/s 90 79 69 58 48 38 27 17 6 0
Gas-Cooled Fast Reactor (2) Total Power Output 9 Armour 0 Exp 5%
Krauss-Maffei M4 Lenkraketenwerfer (10) Missile Size 4 Rate of Fire 40
ThyssenKrupp TKF-54 Raketenfeuerleitsystem (2) Range 53.6m km Resolution 125
Diehl BGT Adler Lenkflugkörper (133) Speed: 27,300 km/s Range: 53.8m km WH: 5 Size: 4 TH: 91/54/27
ThyssenKrupp TK-2 Anti-Raketen-Radar (1) GPS 40 Range 2.0m km MCR 218k km Resolution 1
ThyssenKrupp TK-54 Schiffsradar (1) GPS 12000 Range 53.7m km Resolution 125
Großer EM-Sensor (1) Sensitivity 15 Detect Sig Strength 1000: 15m km
Königsberg class Destroyer 9,000 tons 254 Crew 1472.2 BP TCS 180 TH 720 EM 0
4000 km/s Armour 6-38 Shields 0-0 Sensors 1/5/0/0 Damage Control Rating 4 PPV 40
Maint Life 2.2 Years MSP 409 AFR 162% IFR 2.2% 1YR 114 5YR 1707 Max Repair 120 MSP
Intended Deployment Time: 11.9 months Spare Berths 0
MTU Friedrichshafen V240 Ionentriebwerk (3) Power 240 Fuel Use 56% Signature 240 Exp 10%
Fuel Capacity 500,000 Litres Range 17.9 billion km (51 days at full power)
Rheinmetall Bordkanone(k) 100/400 (4x4) Range 40,000km TS: 4000 km/s Power 3-3 RM 4 ROF 5
Rheinmetall Bordkanone(k) 200/400 (4x4) Range 160,000km TS: 4000 km/s Power 12-4 RM 4 ROF 15
ATLAS-192 Bordkanonenfeuerleitsystem (1) Max Range: 192,000 km TS: 4000 km/s 95 90 84 79 74 69 64 58 53 48
ATLAS-96 Bordkanonenfeuerleitsystem (2) Max Range: 96,000 km TS: 4000 km/s 90 79 69 58 48 38 27 17 6 0
Gas-Cooled Fast Reactor (7) Total Power Output 31.5 Armour 0 Exp 5%
ThyssenKrupp TK-2 Anti-Raketen-Radar (1) GPS 40 Range 2.0m km MCR 218k km Resolution 1
ThyssenKrupp TK-54 Schiffsradar (1) GPS 12000 Range 53.7m km Resolution 125
EM-Sensor (1) Sensitivity 5 Detect Sig Strength 1000: 5m km
Bremen class Escort 6,000 tons 135 Crew 972.8 BP TCS 120 TH 480 EM 0
4000 km/s Armour 5-29 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 3 PPV 10
Maint Life 2.42 Years MSP 304 AFR 96% IFR 1.3% 1YR 71 5YR 1070 Max Repair 144 MSP
Intended Deployment Time: 12 months Spare Berths 0
Magazine 310
MTU Friedrichshafen V240 Ionentriebwerk (2) Power 240 Fuel Use 56% Signature 240 Exp 10%
Fuel Capacity 270,000 Litres Range 14.5 billion km (41 days at full power)
Krauss-Maffei M1 Lenkraketenwerfer (10) Missile Size 1 Rate of Fire 10
ThyssenKrupp TKF-7 Raketenfeuerleitsystem (2) Range 7.2m km Resolution 1
Diehl BGT Falke Abwehrrakete (310) Speed: 29,400 km/s Range: 5.9m km WH: 1 Size: 1 TH: 107/64/32
ThyssenKrupp TK-7 Anti-Rakete-Sensor (1) GPS 144 Range 7.2m km MCR 784k km Resolution 1
ThyssenKrupp TK-27 Schiffssensor (1) GPS 6000 Range 26.8m km Resolution 125
I'm not completely satisfied with the designations, but if you want to, I can try developing a nomenclature system for more than that.