On 17 December U-131 was spotted by a Grumman Martlet aircraft from the escort carrier  while shadowing Convoy HG 76 as part of the Seeräuber (English: "Pirate", lit.
On 17 December U-131 was sighted by a Grumman Martlet aircraft from the escort carrier while shadowing Convoy HG 76 as part of the Seeräuber (English: "Pirate", lit.