By 1806, the French squadron under Rear-Admiral Charles Linois departed for the Atlantic Ocean and a British expeditionary force captured the Cape of Good Hope.

[6] Deciding that Phoenix was lying in an exposed position and could be easily attacked, Rainier sailed Caroline towards Onrust, but was spotted in the passage between Middlebey and Amsterdam Islands by two small Dutch warships.

However, Rainier then sighted a second frigate, lying at anchor in Batavia Roads, accompanied only by the 14-gun corvette William, the elusive brig Zee-Ploeg, and the 18-gun ship Patriot that belonged to the Dutch East India Company.

Although this force was significantly stronger than Caroline, and could call on the support of approximately 30 gunboats anchored closer inshore, Rainier immediately gave orders to advance on the Dutch frigate.

[7] As Caroline approached, Captain Jager ordered his men to open fire on the British frigate at extreme range, also calling on support from the other Dutch vessels anchored nearby.

In response, Rainier gave orders for his men to hold fire, enduring the Dutch guns until his frigate was just 40 yards (37 m) away before unleashing a full broadside.

Taking possession of the Dutch frigate, Lieutenant Lemage discovered that 50 of the 270 men aboard had been killed or wounded and that the ship had suffered moderate damage to its masts and rigging.

[1] Following the surrender of Maria Riggersbergen, most of the shipping in the bay including all seven of the merchant vessels, the three small warships and Phoenix, had deliberately beached themselves to avoid capture.

[12] Rainier remained in the Pacific for some time, capturing the valuable Spanish ship San Raphael in January 1807, but ultimately his career stalled on his return to Europe.