"Washington-based 38 North, a North Korea monitoring project, published images taken on November 5 showing activity at North Korea's Sinpo South Shipyard.
The report said that throughout 2017 there had been continued movement of parts and components into and out of two parts yards adjacent to the constructions halls in the centre of the shipyard.
It said the November 5 images showed two large circular objects that could be sections of a submarine's pressure hull. It said these appeared larger than those for North Korea's ROMEO-class attack submarine.
Images of a test stand indicated continued testing of a mechanism for ejection launch of missiles from a submarine."
https://www.thesun.co.uk/news/4933856/north-korea-ballistic-missile-submarine-satellite-images/
The report said that throughout 2017 there had been continued movement of parts and components into and out of two parts yards adjacent to the constructions halls in the centre of the shipyard.
It said the November 5 images showed two large circular objects that could be sections of a submarine's pressure hull. It said these appeared larger than those for North Korea's ROMEO-class attack submarine.
Images of a test stand indicated continued testing of a mechanism for ejection launch of missiles from a submarine."
https://www.thesun.co.uk/news/4933856/north-korea-ballistic-missile-submarine-satellite-images/