Soviet landcruiser cannon could pierce some spots in the side armor.
Previous Japanese practice was not to use side armor above the main belt.
The side armor was removed in order to make room for the mount.
However, this was only happening at very close ranges and against the thinner side armor.
However, by the end of the 1870s, ships could be found with full-length armored decks and little or no side armor.
Designed to protect above, they had no side armor, and the Sixth was opened to attack.
Air bottles for the crew were clamped to the side armor.
At the casemate deck the side armor was also 100 mm thick.
"They can penetrate the side armor, sir," the youngster answered.
The use of modular components significantly improves the side armor compared to the Type 90.