A young Russian seafarer has been rescued eight hours after falling from a Japanese tanker off Indonesia.

Indonesia's navy said 22-year-old Russian Aboldin Artem was reported missing from the 51,000-dwt MR St Katharinen (built 2013) just after midnight local time on Friday (1700 GMT Thursday) off the Riau Islands.

The vessel, owned by Japan's Maruta Industries, was en route from Russia to Malaysia.

The navy corvette KRI John Lie 458 was on patrol in the area when it received a distress message from the tanker.

The crewman was found eight hours later, suffering from hypothermia but otherwise unharmed.

"After getting initial treatment, the victim was returned to St Katherinen," the navy said in a statement sent to iNews.

Tracking data showed the vessel anchored off Singapore on Monday.

Often, seafarers who fall overboard are never found.

Pacific Ocean escape

But in March, Vidam Perevertilov, chief engineer on board the 51-loa seismic survey ship Silver Supporter (built 1998), was found 14 hours after falling from the vessel.

The Fjord Shipping-operated vessel was 400 nautical miles (741 km) from the tiny Austral Islands in the southern Pacific Ocean.

The Russian survived by clinging to a fishing buoy before being rescued by his own vessel.

The crew did not notice he was missing for six hours.

The vessel then sent a distress call and a French navy aircraft joined the search from Polynesia.

Perevertilov later told his son, Marat, he had been feeling dizzy after finishing a night shift in the engine room, and had walked out on to the deck to recover, but plunged from the vessel.