Completed in August 1919 as Lake Elkwater for the US Shipping Board (USSB). 1929 renamed Commercial Bostonian for Moore-McCormack Lines Inc, New York. 1940 sold to Brazil and renamed Ozório.

On 8 Jun 1942, the Ozório rescued eleven survivors from a lifeboat of Robin Moor in 00°16N/37°37W and landed them at Recife, Brazil.

During the night of 27/28 Sep 1942, U-514 attacked a small convoy consisting of four merchant ships escorted by USS Roe (DD 418) (Cmdr J.N. Opie, USN) while on the surface off the Amazon estuary about 130 miles north-northwest of Salinas, Pará. At 01.05 hours, the first torpedo was fired which missed the leading ship, the American steam tanker Standard Arrow. A second torpedo fired five minutes later struck and sank Ozório just when the U-boat was forced to dive after being taken under fire by the Brazilian steam merchant Imediato João Silva. U-514 surfaced shortly afterwards to overtake convoy again and at 02.07 hours fired a spread of two torpedoes which were evaded by USS Roe and missed the Lages. The destroyer immediately headed for the U-boat by following the torpedo wake, but the attacker managed to fire another torpedo from a stern torpedo tube before crash diving at 02.16 hours. This torpedo sank Lages and U-514 succeeded to retreat from the area without being attacked by the escort.

The unarmed Ozório (Master Almiro Galdino de Carvalho) was hit on the starboard side at #3 hold by one torpedo and sank with a heavy list to port about 25 minutes after being torpedoed in shallow waters. USS Roe circled the sinking ship in search for the U-boat, but soon left to rejoin convoy. The crew was forced to abandon ship in only one lifeboat and on rafts because the other boats on the starboard side had been destroyed by the explosion and the davits of one on the port side had been damaged when struck by debris. The master and three crew members were lost. The lifeboat rescued 15 men from the rafts and then set sail towards the coast. In the morning of 29 September, the survivors were picked up by the Brazilian yacht Concórdia after reaching the Maguary light vessel off Marajó Island and were landed at Mosquerio, from where they were taken to Belém by the Brazilian tug Almirante Alexandrino. However, one crew member died of wounds after being rescued.