The Mexican gun was of Fillipino origin,
Big Gun Report:
Skoda 10"/45
Caliber = 10.0 inch (25.4 cm)
Shell weight = 525 lbs (238 kg)
Muzzle velocity = 2625 fps (800 m/s)
Relative ballistic performance: 0.95
Muzzle energy = 76.283 megajoules = 28110.3 foot-tons
Relative muzzle energy: 0.88
Typical barrel length: 45 calibers
Elevation Range Time Velocity Fall Angle
2.5 deg 5400 yards 6.9 sec 2111 fps 2.9 deg
5.0 deg 9500 yards 13.3 sec 1796 fps 6.5 deg
7.5 deg 12800 yards 19.3 sec 1590 fps 10.5 deg
10.0 deg 15600 yards 24.9 sec 1452 fps 14.7 deg
12.5 deg 18000 yards 30.4 sec 1355 fps 19.2 deg
15.0 deg 20100 yards 35.6 sec 1291 fps 23.7 deg
20.0 deg 23600 yards 45.4 sec 1226 fps 32.0 deg
25.0 deg 26400 yards 54.7 sec 1213 fps 39.5 deg
30.0 deg 28600 yards 63.6 sec 1228 fps 45.9 deg
35.0 deg 30300 yards 72.0 sec 1259 fps 51.3 deg
40.0 deg 31400 yards 80.0 sec 1298 fps 55.9 deg
45.0 deg 31900 yards 87.5 sec 1340 fps 59.8 deg
50.0 deg 31600 yards 94.5 sec 1381 fps 63.3 deg
Armor Penetration - Vertical Belt Armor
(Relative armor quality, 0.95)
Maximum penetration: 20.02 inches
Elevation Range Belt Deck
1.8 deg 4100 yards 16 in
3.2 deg 6600 yards 14 in
5.0 deg 9500 yards 12 in
5.4 deg 10000 yards ... 1 in
7.6 deg 12900 yards 10 in
11.7 deg 17200 yards 8 in
11.7 deg 17300 yards ... 2 in
19.0 deg 22900 yards 6 in
19.3 deg 23100 yards ... 3 in
25.6 deg 26700 yards ... 4 in
32.2 deg 29500 yards ... 5 in
35.4 deg 30400 yards 4 in
39.5 deg 31300 yards ... 6 in
47.4 deg 31900 yards ... 7 in
Maximum range = 31900 yards at 45.7 deg elevation
Because the 10" gunned ships are far more common. The Hertogs got bitch slapped, so that just leaves the Radiance and Brilliance. That and I'm not going to put a ship armed with 9" guns against a ship armed with 11" guns if I can help it.
Yes, but the chances of meeting an 11" gunned ship are far more likely, and the SAE Twins are quite fast. Unless Amazonas is capable of 35knots, there's a good chance she can be caught by the Twins.
Thought a better idea is just to armor against 8" guns and stuff the ship with speed.