The museum can be reached by boat from Tha Chang Pier near the Grand Palace. It houses several royal barges used in Royal ceremonial processions on the river.
The most beautiful and important barge is the Suphannahong, the king's personal barge, which was built in 1911 in the reign of King Rama VI. It is 44.7 metres long and 3.1 metres wide, being the largest and most elaborate dugout in the world. The name, meaning "golden hongsa", came from the bow of the barge carved into the shape of the head of a mythical bird called hongsa.
Another important barge is Narayana Songsuban, the newest royal vessel constructed for King Rama IX. Its bow was carved in the shape of the Hindu God Narayana riding the Garuda.