Shetlandsgjengen. Heltene i Nordsjøen, s. 403:
Innlemmet i Shetlandsgjengen: 15.8.1941, nr. c025.
Antall turer: sesong 1941-42=10, sesong 1942-43=4, sesong 1943-44=6, sesong 1944-45=30.
Overført annen virksomhet: 15.12.1944.
Var med i vinterkrigen i Finland i 1940, og ble tildelt Medaljen for norske finlandsfrivillige 1940 og Den svenske plakett for deltakelse i Finlandskrigen.
Han ble det mest kjente medlemmet av Shetlandsgjengen etter å ha krysset Nordsjøen mer enn femti ganger med agenter, våpenlaster og flyktninger. Han ble Norges mest dekorerte sjøoffiser.
Se artikkel om Shetlandsgjengen i temasider for mer informasjon om Larsen.
The National Archives, Kew: HS 9/891/7:
1st Dump, 14.-18 September 1941
2nd Maundy, 19.-31 October 1941
Take Messenger, 6. 15. November 1941
Operation, 24.-30 November 1941
Operation, 20.-30 January 1942
Lark & Lerken II, 8.-14. February 1942
Ramose Kobie, 12.-13. March 1942
Operation, 26.-2. April 1942
Lerken pick-up 9.-14 April 1942
T. 26.-14. December 1942
Ramose Barga, 4.-11. March 1943
Ramose Pondicherry, 17. March. Bombed. Rescued 12. April 1943
Ramose Feisal, 17.-22. January 1944
Ramose Brigand, 6.8.10.-15. April 1944
Ramose Santander, 26.-27. February 1944
Ramose Aquatic, 4.-6. March 1944
Ramose Orphan, 15.-18. March 1944
Ramose Embargo, 23.-25. March 1944.
Fra rapport i anledning anbefaling av tildeling av D.S.O.:
"Sub. Lieutenant Larsen carried out thirty operations to Norway from a secret base in Shetland as Commanding Officer of Subchaser "Vigra" between 17th August 1944 and 5th May 1945. He has thus carried out a total of fifty clandestine operations in all, in fishing boats and subchasers.
Whilst the smooth progress of operations during this period has not called for any exploits as spectacular as those which this Officer has carried out in the past, he continued to show through these months those qualities of initiative and leadership which have been largely responsible for setting the tone of the whole Unit, engaged on these operations. [...]
On 26th November 1944 Sub. Lieut. Larsen set out on S/C "Vigra" on the longest trip (1,200 miles) ever undertaken by a Sub-Chaser from Shetland. The rendezvous was reached 45 minutes after the agreed time, and the transhipment of stores into a fishing boat carried out according to plan. A tempestuous head sea was encountered on the return journey, and "Vigra" put in to Baltasound with only 400 gallons of fuel left. Larsen's trip report was, as usual, a masterpiece of understatement, as on 29th November 1944 Coastal Command reported a whole gale blowing and a mountainous sea running. Sub. Lieut. Larsen showed magnificent seamanship in bringing "Vigra" home without any damage. [...]
No one in the Special Unit has maintained better discipline afloat or succeded in carrying out so well and so minutely both the letter and the spirit of any orders."
"While carrying out an operation in March 1943 his ship was attacked and sunk by aircraft. During the attack he showed great determination and so manoeuvred his ship that his gunners were enabled to score hits on both attacking machines. After his ship had sunk he succeeded in getting all survivors into the ship's boat, made an accurate landfall in enemy occupied territory after four and a half days, concealed the survivors ashore and arranged to have them picked up and brought back to the Shetlands."
«Shetlandsgjengen. Heltene i Nordsjøen», Asgeir Ueland, 2017.
Privat arkiv avgitt til Stiftelsen Arkivet.
"Krigskorset og St. Olavsmedaljen med ekegren", redigert av Erik Gjems-Onstad, Oslo 1995.
The National Archives, Kew: HS 9/891/7 I dokumentasjonen, 111 sider, er det svært utfyllende om hans tjeneste.
Privat arkiv avgitt til Arkivet freds- og menneskerettighetssenter
"Seedie's List of Submarine Awards for World War II," Seedie, 1990, s. 92.