In 1801, a court-martial dismissed Captain Richardson from command of Mornington for "improper behavior" in the presence of the enemy in the Bay of Bengal.

[a] In 1805, the Al Qasimi Arabs of the Gulf captured two merchant brigs, Shannon and Trimmer.

[6] Later in 1808, a huge fleet of 50 raiders appeared off Sind in the Arabian Sea and caused severe disruption to the regional trade.

At the height of their campaign, the Al Qasimi forces in the Persian Gulf and Arabian Sea included an estimated 60 large bhagalas, over 800 dhows, and employed 19,000 men, against just two EIC ships, Mornington and Teignmouth.

[6] Mornington was one of the many EIC and Royal Navy vessels that participated in the subsequent Persian Gulf campaign of 1809.