At 19.12 hours on 18 Jun 1940, U-32 stopped the two Spanish trawlers Sálvora and Nuevo Ons because they were outside of the allowed area of fishing and sank both by gunfire after the crews abandoned ship. Five fishermen from Nuevo Ons were lost and another later died. 19 survivors from both trawlers were rescued by the two lifeboats from Altair, which had been earlier attacked by the same U-boat.

All survivors were picked up later that same night by the Spanish trawler Iparreko-Izarra, which also located an empty lifeboat of Balmoralwood. The men were later transferred to the Spanish trawler Piedi and landed at Pasajes, Spain on 21 June.