• " Unternehmen Walfisch" was an aborted plan to land a seaplane on a lake in Ireland. Walfisch did not take place and planning was abandoned by July 1940.

• "Unternehmen Wal" was an aborted plan devised in November 1940 to establish contacts with Welsh and Scottish nationalist groups in Britain in preparation for Operation Sea Lion ("Unternehmen Seelöwe" in German).

The agent that was to undertake the mission was one of the Abwehr's Irish "experts", Helmut Clissmann. He was to be transported to Britain by Christian Nissen aka. "Hein Mueck" or "Agent Hein". Planning for Whale took place when all Irish operations were prohibited by Abwehr chief Wilhelm Canaris

Wilhelm Canaris

Wilhelm Franz Canaris was a German admiral, head of the Abwehr, the German military intelligence service, from 1935 to 1944 and member of the German Resistance.- Early life and World War I :...

. In order to work around the direct order not to interfere in Irish affairs, Abwehr Section leader Kurt Haller sought permission for an operation which had the stated aim of seeking assistance from Welsh and Scots groups although the outright aim was to seek further contacts with Ireland. Wal did not take place and planning was abandoned by April 1941.

Notable Abwehr Operations involving Ireland

• Operation Green (Ireland)
  Operation Green (Ireland)
  Operation Green often also referred to as Case Green or Plan Green , was a full scale operations plan for a German invasion of Ireland in support of Operation Sea Lion . Despite its detailed nature, Green is thought to have been designed only as a credible threat, a feint, not an actual operation...
  
  
• Operation Lobster
  Operation Lobster
  In 1940 the Germans decided to send agents and saboteurs to infiltrate Britain from Norway and Northern France. This plan was given the codename Operation Lobster...
  
  
• Operation Lobster I
  Operation Lobster I
  Operation Lobster I was an Abwehr plan to infiltrate three German agents into Ireland, , in July 1940...
  
  
• Operation Seagull (Ireland)
  Operation Seagull (Ireland)
  Operation Seagull was an Abwehr II/Brandenburger Regiment sanctioned mission launched in September 1940...
  
  
• Operation Seagull I
  Operation Seagull I
  Operation Seagull I was an Abwehr II sanctioned mission devised in May 1942. The plan was the brainchild of Kurt Haller and an expert from Abwehr I-Wi...
  
  
• Operation Seagull II
  Operation Seagull II
  Operation Seagull II was an Abwehr II. sanctioned mission planned in June 1942 as a refinement of Operation Seagull I...
  
  
• Operation Whale
• Operation Dove (Ireland)
  Operation Dove (Ireland)
  Operation Dove also sometimes known as Operation Pigeon, was an Abwehr sanctioned mission devised in early 1940...
  
  
• Operation Osprey
  Operation Osprey
  Operation Osprey was a plan conceived by the German Foreign Ministry and Abwehr II. mid 1942. The plan was an enlargement of Operation Whale...
  
  
• Operation Sea Eagle
  Operation Sea Eagle
  Operation Sea Eagle sometimes referred to as Operation Dove II was a German Foreign Ministry plan conceived in May 1941 after the collapse of planning around Operation Whale .The operation was to involve landing a seaplane on a lake in Ireland to supply the Irish Republican...
  
  
• Operation Mainau
  Operation Mainau
  Operation Mainau was a German espionage mission during the Second World War. It was sanctioned and planned by the German secret service and executed successfully on May 1940...
  
  
• Operation Innkeeper
  Operation Innkeeper
  Operation Innkeeper was an aborted plan devised in Autumn 1941 to send two Irish Abwehr agents to London on a sabotage mission....