The first royal yacht, Dannebrog, was also a very much a navy ship.
Notice the tight rigging with the masts leaning back in the cruiser style.
And the long low narrow hull.
The bridge is also midship, as was standard for warships in the mid to late 1800s. Hence the term "bridge", because that's what it was. Replacing the previous term "quarterdeck."
Very much in line with the modern steel warships that were replacing the hybrid steel-wooden ships of the line around the time she was build.
In fact the first electricity plant in DK was a warship.
This first Dannebrog was, I understand, slow. Hardly suited for oceanic voyages, but more for sailing in calmer seas and along coasts. It was also dirty, being coal-fueled and she rolled a lot.
By 1930 she was hopelessly old-fashioned and was replaced by the much more elegant and more feminine present-day Dannebrog. A diesel-driven steam-ship and much better suited for oceanic voyages.
A pity though, they didn't preserve her. As an engineering historical ship she was interesting.
But there was actually a ship number one before the first Dannebrog. And she is preserved to this day.
The frigate Jylland (Jutland).
Here she is: https://i.pinimg.com/originals/35/7e...0205f010be.jpg
And at sea: https://maritimevenner.com/wp-conten...nderEnByge.jpg
Termed a frigate, she was really a hybrid heavy cruiser and she saw action during both Schlesvigan Wars.
There is cabin reserved for the king aboard, complete with a private head (privy) for the king. And she was used to ferry the king around the country, but she was hardly a yacht.
Before that the king usually raised his standard aboard the largest ship of the line available and commandeered the admirals cabin.