Correction May 14, 12:55 KST: The text “every one of a half-dozen instances since last summer” has been changed to “seven of eight instances since May 2019,” and “11 of 17 occasions since summer 2016” to “13 of 16 occasions since April 2017” after further review of the data.

Boats often used by North Korean leader Kim Jong Un off the coast of Wonsan have been active throughout this month and made unusual moves around the time of a mystery April 14 missile test by Pyongyang, NK Pro satellite imagery analysis showed this week, indicating his likely continued presence in the area.

NK Pro has