SS Rightful Justice

weapon name: SS Rightful Justice
description: A boat, about the length of 5 normal ships and width of 3 buster-call-ships, entirely made of metal [an ironclad] with the navy's trademark hint of seastone to hide it from large underwater critters. The hull is a full 12 inches thick and curved for balance and to repel cannonballs from smooth-bore [aka standard canons boats have] cannons. The full top deck is a huge tower for the bridge which in itself could be described as a doom fortress, on each side of the bridge are 2 fully rotating turrets one slightly over the other to prevent hazardous crossfire, each of the 4 turrets has 4 guns, each of which has the force of twenty 50-pound artillery guns [the weight is the weight of the shell being projected] combined, making for guns that are the scariest things on the ocean. Also, on the sides are Gatling guns for anti-personnel fire.
weapon special abilities: Insulation prevents electrical attacks, seastone keeps away large monsters and normal cannons cannot penetrate the hull. Also, every gunner is protected from fire, making it into a seriously deadly floating fortress.
history: Only one thing like this was ever attempted. Only this specific ship. No one else has the money and resources to do this but the World Government. The Buster-Call is the “Bigger”, this is the “Better”

[this IS possible because I know of the fact that in canon there's a character with a fricking SUBMARINE. And Steam-power shouldn't be hard since robots and cyborgs exist. there's no grounds for refusal.....]

APPROVED, somewhat hesistatingly. I trust you not to misuse it though.

It's specifically to A Guard the new prison and B to banhammer if someone's overpowered, of course with admin permission.