Battle of the Gulf of Oman
1554 CE.
Shown on the map at 25.000°, 58.000°.
The Battle of the Gulf of Oman was a naval battle between a large Portuguese armada under Dom Fernando de Meneses and the Ottoman Indian fleet under Seydi Ali Reis. The campaign was a catastrophic failure for the Ottomans who lost all of their ships. Seydi Ali Reis later wrote that the engagement was "worse than any he had lived through under Barbarossa".
Text from the Wikipedia article Battle of the Gulf of Oman, licensed CC BY-SA 4.0.