A little matter of scale...

Inspired by a photo of what might be a very large radio-controlled model boat, a 22 foot (seven metre) long copy of an aircraft carrier. Two uniformed American Navy officers are standing on its flight deck, grinning and posing for a photograph. (Alterrnatively, it could be clever photoshop but I'm choosing to believe in context that it's an RC model with normally-sized people standing on the flat-top)

The HAMMS Incredible, designed by the noted naval architect BS Johnson for the Royal Ankh-Morporkian Navy as a broomstick carrier. (Sister ships are provisionally named as the HAMMS Indescribable and the HAMMS Inexplicable). The idea being that the Navy and the Air Watch collaborate in naval aviation and have ships capable of housing a mixed crew of magic carpets and broomsticks. Captain Romanoff of the Air Watch has suggested, after a necessary deeper breath, that this might serve for four or five nautically-inclined Feegle and their companion seabirds. And those miniature Barking Dogs in the side turrets, are they crewed by gnomes or imps?

"And I now need to check the fine points of the Law to see how miniature a Barking Dog has to be, before it gets reclassified as a Gonne. Which, Mr Johnson, is still illegal in this City."

it also inspired a non-Discworld flight of fancy:

Mrs Margaret Atkinson of 22 Dalton Street glared at her luckless husband as he tried to inobtrusively get the new model kit he'd bought into the house. He knew from experience that she dissaproved of the time and money he spent on his hobby. She stood, with folded arms, silently glaring at him. He decided to try to reason it out.

"It's the new release from Airfix, dear." he said, to break the silence. "HMS Illustrious(1). you know, the aircraft carrier. As she would have looked in 1941."

She glared steadily at him.

"She was 945 feet long, dear. A real queen of the sea. And this is the first time this ship's been done in this scale. 1:48. Lots of small fine detail..."

And then the niggling thought in the back of his mind reminded him of why the box was so unexpectedly big. Belatedly, he did a little mental arithmetic about a 945 foot long ship in 1:48 scale.

"Oh..." he said, realising.

Footnotes, because there must always be at least one.

(1) Brief boring history: Illustrious was one of two British carriers that launched the devastating raid on the Italian Navy in its home port of Taranto in November 1941. She became a priority target for the Axis, and a combined German/Italian air attack nearly sank her in the following year. Incredible seamanship got the almost completely gutted ship to the USA, where she was rebuilt by the Americans to British specifications. Illustrious then served against the Japanese as part of the British Pacific Fleet (we did have a presence there) and was ineffectually Kamikazi'd at Okinawa and Iwo Jima. She then flew the first British air attacks on the Japanese mainland. She saw further active service in the Korean War, and was finally decommissioned in the early 1960's, finally sunk not by the Italians, Germans or Japanese, but by British politicians and civil servants - the worst enemy of the British armed forces.