Britain's most powerful warship has arrived in the capital on the Thames to protect the King during the coronation.
The HMS Diamond is a Type-45 destroyer with firepower and radars to track down missiles and drones.
The radars' technology can spot targets the size of a cricket ball at three times the speed of sound and from 250 miles away.
It can also guide up to 16 missiles at the same time as they head towards zig-zagging targets.
The warship will be docked at Greenwich in South East London to "celebrate the Coronation", the Navy has said.
It will also be used to host a series of VIP cocktail parties and performances.
However, Navy sources have reportedly told The Sun its defence systems can be triggered at a "flick of a switch".
The ship is 500 feet long and can carry up to 48 Sea Viper missiles, with them launching vertically from the ship's foredeck.
The missiles reach the speed of sound and "manoeuvre for the kill at G-forces no human can withstand”, the Navy says.
The HMS Diamond arrived at the Thames flood barrier this week as security for the coronation is ramping up.
Earlier, we reported how a massive security operation will push the cost of the Coronation of King Charles III into the realm of £250million.
A huge chunk – around £150million – will be needed to deploy thousands of police officers and protection squads, insiders reveal.
The rest goes on staging the ceremony and three days of celebrations.
The eye-watering cost to taxpayers is despite the King’s wishes for a slimmed-down, cost-effective monarchy.
It cost Britain £1.57million to stage the Queen’s Coronation in 1953 – around £47million in today’s money. But ever-increasing security threats and a series of planned domestic protests have sent costs for Saturday’s event – codenamed Operation Golden Orb – soaring way above earlier estimates of £100million.
Home Office sources revealed last night that a special air traffic control schedule has been drawn up for dignitaries flying in.
Security will be tightened at landing spots, which include RAF Northolt in Middlesex and RAF Biggleswade, Beds, from Thursday.
