At 02.10 hours on 11 Jun, 1942, the unescorted Crijnssen (Master W. v.d. Giessen) was hit by two torpedoes from U-504 and sank after being hit by a coup de grâce. The ship was repatriating 12 survivors from the Sylvan Arrow, which had been sunk by U-155 (Piening) on 20 May 1942 and 10 survivors from the Lise, which had been sunk by U-69 on 12 May 1942.
43 survivors landed in their lifeboats on the Yucatan coast and were later flown from Chetumal to Brownsville, Texas. 49 survivors were picked up the same day by the Lebore, which was herself sunk by U-172 (Emmermann) three days later. All survivors from the Crijnssen also survived the second sinking.