Arata Amagi Kai-class battleships

The Arata Amagi Kai-class battleships are the advanced version of the common Arata Amagi Class Battleships, fielded by Grik Empire somewhere after the battle of Madagascar.

Design
Generally the same as standard Arata Amagi-class, with somewhat enlarged size and changes in weaponry and protection.

Armament:
In contrast with standard Arata Amagi-class battleships, which relied solely on their powerful broadside battery, the new battleships possess more advanced armament. Their main armament consisted of three heavy 15-inch (380-mm) cannons, placed at the ends of their casemate. Two guns are placed on bow (one on each gun deck) and one on stern. Those guns are smoothbores, firing 400-pdr shots. Since 15-inch guns are too long to be completely retracted inside for reloading, they are reloaded externally by the use of overhanging booms & lines.

The secondary armament consisted of old-fashioned 100-pdr smoothbore broadside cannons, placed on two gun decks inside the casemate. The number of 100-pdr guns were somewhat reduced in comparison with basic design, to accommodate the heavy 15-inch guns.

The anti-aircraft armament consisted of 24 anti-air mortars, firing canister shots and primitive shrapnel rounds against low-flying planes. It is possible, that some rocket batteries are installed too.

Armor:
The armor of Arata Amagi Kai-class battleship was upgraded as well, with what seems to be additional layers of armor plates added on frontal slopes. The overall quality of armor plates was improved as well. During the blockade of Zambezi River, the frontal armor of those battleships were able to withstand the direct hit from 10-inch rifled gun (common shell) and barrage of smaller 4.5-inch guns of Santa Catalina, albeit not the AP shells from 10-inch rifles.

The underwater protection wasn't improved, and ships are still extremely vulnerable to torpedo damage.

Powerplant:
Twin-screwed, double-expansion steam engines, powered by 16 coal-fueled boilers. Seems to be only marginally improved in comparison with the basic design.