Pennant of the president of the Republic of Poland

The pennant of the president of the Republic of Poland, Commander-in-Chief of the Armed Forces of the Republic of Poland (Polish: proporzec Prezydenta Rzeczypospolitej Polskiej – Zwierzchnika Sił Zbrojnych Rzeczypospolitej Polskiej) is a presidential standard (flag) used in the Polish Armed Forces to mark the presence and pay respect to the president of the Republic of Poland who is also ex officio the commander-in-chief of the Armed Forces. The pennant is raised on Polish Navy ships when the president is officially on board, as well as on land, if the president is present.

Source: Wikipedia — Pennant of the president of the Republic of Poland (CC BY-SA 4.0)