Operation Frankton was a commando raid on ships in the German occupied French port of Bordeaux in southwest France during World War II. The raid was carried out by a small unit of Royal Marines known as the Royal Marines Boom Patrol Detachment (RMBPD), part of Combined Operations, inserted by the submarine HMS Tuna captained by Lieutenant-Commander Dick Raikes who, earlier, had been awarded the DSO for operations while in command of the submarine HMS Seawolf (47S). The RMBPD would later form the Special Boat Service.
The plan was for six folding kayaks to be taken to the area of the Gironde estuary by submarine. Twelve men would then paddle by night to Bordeaux. On arrival they would attack the docked cargo ships with limpet mines and then escape overland to Spain. Men from no.1 section were selected for the raid; including the commanding officer, Herbert "Blondie" Hasler, and with the reserve marine Colley the team numbered thirteen in total. One kayak was damaged while being deployed from the submarine, and it and its crew therefore could not take part in the mission. Only two of the ten men who launched from the submarine survived the raid: Hasler, and his number two in the kayak, Bill Sparks. Of the other eight, six were executed by the Germans and two died from hypothermia. Two German vessels were sunk with another four suffering varying degrees of damage.
The Royal Marines Boom Patrol Detachment (RMBPD) was formed on 6 July 1942, and based at Southsea, Portsmouth. The RMBPD was under the command of Royal Marines Major Herbert "Blondie" Hasler with Captain J. D. Stewart as second in command. The detachment consisted of 34 men and was based at Lumps Fort, and often exercised in the Portsmouth Harbour and patrolled the harbour boom at night. On 13 August 1942, Hasler and Stewart visited HMS Tormentor to attend a demonstration of fast motorboat training, in preparation for the operation.
The Bay of Biscay port of Bordeaux was a major destination for goods to support the German war effort. In the 12 months from June 1941 to 1942 vegetable and animal oils, other raw materials, and 25,000 tons of crude rubber had arrived at the port. Hasler submitted a plan of attack on 21 September 1942. The initial plan called for a force of three kayaks to be transported to the Gironde estuary by submarine then paddle by night and hide by day until they reached Bordeaux 60 miles (97 km) from the sea, thus hoping to avoid the 32 mixed Kriegsmarine ships that patrolled or used the port. On arrival they hoped to sink between six and 12 cargo ships then escape overland to Spain.
Permission for the raid was granted on 13 October 1942, but Admiral Louis Mountbatten, chief of combined operations, increased the number of kayaks to be taken to six. Mountbatten had originally ordered that Hasler could not take part in the raid, because of his experience as the chief kayaking specialist, but changed his mind after Hasler (the only man with experience in small boats) formally submitted his reasons for inclusion. The RMBPD started training for the raid on 20 October 1942, which included kayak handling, submarine rehearsals, limpet mine handling and escape and evasion exercises. The RMBPD practised for the raid with a simulated attack against Deptford, starting from Margate and kayaking up the Swale.
Mark II kayaks, which were given the codename of "Cockle", were selected for the raid. The Mark II was a semi rigid two-man kayak, with the sides made of canvas, a flat bottom and 15 feet (4.6 m) long. When collapsed it had to be capable of negotiating the narrow confines of the submarine to the storage area, and then, before it was ready to be taken on deck, erected and stored ready to be hauled out via the submarine torpedo hatch. During the raid each kayak's load would be two men, eight limpet mines, three sets of paddles, a compass, a depth sounding reel, repair bag, torch, camouflage net, waterproof watch, fishing line, two hand grenades, rations and water for six days, a spanner to activate the mines and a magnet to hold the kayak against the side of cargo ships. The total safe load for the "Cockle" Mark 2 was 480 lb (220 kg). The men also carried .45 1911 Colt semi-automatic pistols and Fairbairn–Sykes fighting knives.
The men selected to go on the raid were divided into two divisions, each having their own targets.
Hasler and Marine Bill Sparks in kayak Catfish
Corporal Albert Laver and Marine William Mills in kayak Crayfish
Corporal George Sheard and Marine David Moffatt in kayak Conger
Lieutenant John Mackinnon and Marine James Conway in kayak Cuttlefish
Sergeant Samuel Wallace and Marine Robert Ewart in kayak Coalfish
Marine W. A. Ellery and Marine E. Fisher in kayak Cachalot
A thirteenth man was taken as a reserve, Marine Norman Colley.
On 30 November 1942 under the command of Lieutenant-Commander Dick Raikes DSO the Royal Navy submarine HMS Tuna sailed from Holy Loch in Scotland with the six kayaks and raiders on board. The submarine was supposed to reach the Gironde estuary and the mission was scheduled to start on 6 December 1942. This was delayed because of bad weather en route and the need to negotiate a minefield. By 7 December 1942 the submarine had reached the Gironde estuary and surfaced some 10 miles (16 km) from the mouth of the estuary. Cachalot's hull was damaged while being passed out of the submarine hatch, leaving just five kayaks to start the raid. The reserve member of the team, Colley, was not needed, so he remained aboard the submarine with the Cachalot crew Ellery and Fisher.
According to Tuna's log, the five remaining kayaks were disembarked at 19:30 hours on 7 December. However sources differ on the start time between 19:36 and 20:22. The plan was for the crews to paddle, resting for five minutes in every hour. The first night, 7/8 December, fighting against strong cross tides and cross winds, Coalfish had disappeared. Further on the surviving crews encountered 5 ft (1.5 m) high waves and Conger capsized and was scuttled, once it became apparent that it would not be possible to bail it out. The crew consisting of Sheard and Moffatt held on to two of the remaining kayaks, which carried them as close to the shore as possible, and they then had to swim for it. The three kayaks met the missing Coalfish shortly afterwards and continued.
Carrying on with the raid, the four remaining kayaks approached a checkpoint in the river and came upon three German frigates. Lying flat on the kayaks and paddling silently they managed to get by without being discovered but Mackinnon and Conway in Cuttlefish became separated from the other kayaks in the group. After reaching the shore, MacKinnon and Conway evaded capture for four days, but were betrayed and arrested by the Gendarmerie and handed over to the Germans at La Reole hospital 30 miles (48 km) southeast of Bordeaux, while attempting to make their way to the Spanish border.
On the first night the three remaining kayaks, Catfish, Crayfish and Coalfish, covered 20 miles (32 km) in five hours and landed near St Vivien du Medoc. While they were hiding during the day and unknown to the others, Wallace and Ewart in Coalfish had been captured at daybreak near the Pointe de Grave lighthouse where they had come ashore.