SS Everalda was a Latvian Cargo ship and part of the Latvian Mercantile Marine during World War II that the German submarine U-158 shelled and sank on 23 June 1942 in the Atlantic Ocean 360 nautical miles (670 km) south south west of Bermuda while she was travelling from Philadelphia, Pennsylvania, United States to Rio de Janeiro, Brazil while carrying general cargo.

[2] Everalda was travelling from Philadelphia, Pennsylvania, United States, to Rio de Janeiro, Brazil, carrying general cargo with a stopover at Cape Henry.

The U-boat crew captured secret codes, confidential papers, routing instructions and other important documents like a letter for the consul at Rio de Janeiro.

The bomber couldn't retrieve the survivors, but instead dropped provisions for one of the two lifeboats which was located about 30 nautical miles (56 km) east of Cape Hatteras.

Two hours later, the same flying boat again dropped provisions for the remaining lifeboat and directed the patrol yacht USS Tourmaline (PY 20) to their position to pick them up as well.