[1] When the Franco-Thai war broke out in late 1940, the navy assigned Sri Ayudhya and Thonburi to the First Squadron, tasked with patrolling the eastern waters against potential French attacks.

On the night of 14 January, the group led by Thonburi set sail from Sattahip Naval Base to relieve Sri Ayudhya and its convoy, which had been stationed at the island of Ko Chang in Trat Province.

[5] It served as a royal transport vessel for Kings Ananda Mahidol and Bhumibol Adulyadej during the final legs of their respective return trips from Switzerland in 1938 and 1950.

[6] On 29 June 1951, in a coup attempt known as the Manhattan Rebellion, a group of junior naval officers held Prime Minister Plaek Pibulsonggram (Phibun) at gunpoint during a boat-transfer ceremony at Ratchaworadit Pier on the Chao Phraya River in Bangkok.

[7] Fighting quickly ensued, and the naval units that sided with the rebels became heavily outnumbered by the army, police and air forces, who were loyal to the government.