Some additional craziness appeared a few turns later: Suddenly I've got duplicate versions of a bunch of ship classes, though the additional ones don't have ordnance set. Mostly, the existing ships kept the with-ordnance versions, while the shipyards got set to the no-ordnance versions.
Related: Some of the extra classes I was able to delete. Others, I'm stuck with. One of them, the Agincourt, got into a particularly difficult state. As of this moment there are three classes:
"WTF Agincourt" which has identical components to "Real Agincourt", but for reasons unclear to me has got slightly different maintenance profile:
WTF Agincourt class Frigate 8,000 tons 202 Crew 1353.8 BP TCS 160 TH 960 EM 0
6000 km/s Armour 4-35 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 5 PPV 30
Maint Life 1.89 Years MSP 529 AFR 102% IFR 1.4% 1YR 191 5YR 2862 Max Repair 480 MSP
Intended Deployment Time: 36 months Spare Berths 0
Magazine 432
General Electric MP-960 (1) Power 960 Fuel Use 55.21% Signature 960 Exp 12%
Fuel Capacity 500,000 Litres Range 20.4 billion km (39 days at full power)
Hotchkiss S1-R10 Launcher (30) Missile Size 1 Rate of Fire 10
Raytheon Missile Fire Control FC3-R1 (1) Range 3.8m km Resolution 1
AMM-1-1 Nike Mk1 (432) Speed: 22,400 km/s End: 4.9m Range: 6.6m km WH: 0 Size: 1 TH: 194/116/58
Raytheon Active Search Sensor MR6-R1 (70%) (1) GPS 63 Range 6.9m km MCR 755k km Resolution 1
Missile to hit chances are vs targets moving at 3000 km/s, 5000 km/s and 10,000 km/s
This design is classed as a Military Vessel for maintenance purposes
Real Agincourt class Frigate 8,000 tons 202 Crew 1353.8 BP TCS 160 TH 960 EM 0
6000 km/s Armour 4-35 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 5 PPV 30
Maint Life 1.88 Years MSP 529 AFR 102% IFR 1.4% 1YR 192 5YR 2885 Max Repair 480 MSP
Intended Deployment Time: 36 months Spare Berths 0
Magazine 432
General Electric MP-960 (1) Power 960 Fuel Use 55.21% Signature 960 Exp 12%
Fuel Capacity 500,000 Litres Range 20.4 billion km (39 days at full power)
Hotchkiss S1-R10 Launcher (30) Missile Size 1 Rate of Fire 10
Raytheon Missile Fire Control FC3-R1 (1) Range 3.8m km Resolution 1
AMM-1-1 Nike Mk1 (432) Speed: 22,400 km/s End: 4.9m Range: 6.6m km WH: 0 Size: 1 TH: 194/116/58
Raytheon Active Search Sensor MR6-R1 (70%) (1) GPS 63 Range 6.9m km MCR 755k km Resolution 1
Missile to hit chances are vs targets moving at 3000 km/s, 5000 km/s and 10,000 km/s
This design is classed as a Military Vessel for maintenance purposes
and a third variant, the "Agincourt Mk3" which I just created by copying "Real Agincourt" and changing nothing except the name.
My 8000-ton shipyard was already tooled for "WTF Agincourt" and didn't offer the option to retool for "Real Agincourt." (Neither did the 16000-ton shipyard, for what that's worth.) When I tried to retool it for "Agincourt Mk3", I got an Error 6. On every succeeding turn, I get another Error 6 and the shipyard shows no progress. (Just a blank space there under the progress column.)
This is sufficiently messy that I'm not going to try to fix it. I'm setting this one aside and starting over. I'll save it, just in case the db may turn out to be useful.