Nui slashes at Ryuko, who redirects the attack into the sea, where it creates a colossal water plume. Firstly, how wide is the bridge of the S. S. Naked Sun? Once again, we'll use the offical height scale, and the unofficial scaling from it.
1 pixel = 195cm/215 = 0.906976744cm
0.906976744cm X 793 =719.232558cm (7.19232558m)
1 pixel = 7.19232558m/79 = 0.0910420959m
0.0910420959m X 517 = 47.0687636m
With all that done, we can finally get to the dimensions of the explosion.
1 pixel = 47.0687636m/458 = 0.102770226m
0.102770226m X 971 = 99.7898894m
0.102770226m X 239 = 24.562084m
0.102770226m X 1205 = 123.838122m
0.102770226m X 201 = 20.6568154m
20.6568154m/2 = 10.3284077m
0.102770226m X 485 = 49.8435596m
49.8435596m/2 = 24.9217798m
Volume of the top part as a cone and the bottom part as a conical frustrum.
V = πr^2/h^3
= π X 10.3284077^2 X 24.562084/3
= 2743.85133m^3
V = (1/3)π(r^2+rR+R^2)h
= (1/3) X π X (10.3284077^2 + 10.3284077 X 24.9217798 + 24.9217798^2) X 99.7898894
= 102950.354m^3
V = 2743.85133 + 102950.354
= 105694.205m^3
Water weighs 1000kg/m^3.
M = 105694.205 X 1000kg
= 105694205kg
We have the mass, so what's the speed?
T = 1s/24
= 41.6666667ms X 16
= 0.666666667s
T = 123.838122m/0.666666667s
= 185.757183m/s
KE = (0.5)mv^2
= (0.5) X 105694205 X 185.757183^2
= 1.8235279e12 joules
= 435.8336281070746 tons of TNT
Final Results
Ryuko deflects Nui's slice attack = 435.834 tons of TNT