A German pilot abandons his Linse explosive motor boat. In theory it would now be radio controlled from a control boat following close behind, who would pick up the pilot. In practice, these boats were virtual suicide weapons used in the Battle of Normandy.
The Linse was one of a number of single manned weapons developed in 1943 and 1944 that were rushed to Normandy in the wake of the D-Day landings. Another was the Neger, a tiny submarine actually made from a torpedo, with an armed torpedo slung underneath it. 
The Neger couldn’t dive – it’s Perspex dome just broke the surface. A slightly larger version, the Marder, eventually replaced it at Normandy. The stretched upper torpedo had space for a diving tank, allowing it to submerge. 📷BillyHill
Operating from Le Havre, these three weapons were used in a number of mass attacks against the Allied anchorages off the Normandy beaches. The first, on the night of 25/26 June was a fiasco. 9 Linse and 8 control boats failed to find any targets and all had to beach themselves.
The night of 5/6 July saw 26 Negers attack the Allied defensive 'Trout line' east of Sword with more success. 2 Auk class minesweepers, HMS Cato and Magic, were sunk with 51 lives lost. But 12 Negers failed to return.📷Auk class USS Chief, Naval History &Heritage Command 96996
On the night of 2/3 August, a combined attack believed to involve 32 Linse and 50 Marder sank the destroyer HMS Quorn and minesweeper HMS Gairsay, whilst a liberty ship and a freighter were both badly damaged. 130 of Quorn's crew alone were lost. 📷IWM A7063
In their final attack of that night, a wave of Linse powered towards the line of the Support Squadron Eastern Flank and at least two struck LCG 764 and she too was lost. 📷 IWM A23753
But losses were heavy for the Germans, with up to 50% of the crews not returning that night. Another Linse attack on 8/9 August saw only 8 out of 28 Linse return, and the Allies only took 6 PoWs. A poor return having sunk no Allied vessels.
The final mass attack by 42 Marders was on 16/17 August. They succeeded in sinking LCF 1 and 2 Marders successfully torpedoed the French battleship Courbet. As Courbet had been deliberately sunk as a breakwater 2 months previously, this was a hollow victory. 📷Le Mémorial de Caen
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