Metropolitan Police Commissioner Cressida Dick has described domestic abuse as a "pernicious problem" as the Duchess of Cornwall was shown innovative technology keeping victims safe.
Camilla was given a demonstration of a secret device during a visit to Met Police offices in Lambeth, south London, which uses the latest global tracking and location capabilities to help police locate the person in distress and provide a rapid response.
The Met Commissioner, who joined Camilla for her visit, said domestic abuse was something her force took seriously and that they were getting "better and better" at dealing with it.
Sat at a desk with communications supervisor Steve Vaughan, Camilla watched as he responded to the fictitious alert which brought up a woman's location and showed the criminal record of her partner and his car details.
The duchess said to the Met Commissioner: "Just seeing it is believing - very impressive."
Since it was launched in the UK in 2011, TecSOS has been adopted by 40 out of 43 UK police forces and has given more 13,000 high-risk domestic abuse victims added security and been activated almost 1,900 times.
Camilla toured the centre where 999 and 101 non-emergency calls from across the capital are taken by staff and chatted to some of those working.
There was a lighter moment when Camilla met staff manning a fundraising tuck shop that donates proceeds to a different charity each month.
Turning to her private secretary who produced Camilla's purse she gave £10 for two chocolate bars.
At the end of the visit the Met Commissioner gave a short speech: "It means an enormous amount to us that you're taking such a keen interest in the issues of domestic violence, which of course remains a really pernicious problem in our society and in London and something we in the Met take incredibly seriously.
"And I think there are lots of signs we are getting better and better and better at dealing - from a police point of view - but there is so much more to do, and the fact you're so interested in this subject and have met colleagues working with the new way of protecting people is really appreciated."
In response, the Duchess praised the work of staff who take emergency calls from those in need: "I'm thrilled to have come today, I've learnt a lot.
"Till you come and see things, like the 999 calls, I don't think me, as an ordinary member of the public, understand quite what goes on behind the scenes.
"I see how much work and how much time goes into it all, and the pressure, the pressure all of you must feel - I'm astounded by all the work you do and I can only congratulate you all, you do us all a tremendous service, I don't know what we'd do without you."