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Originally published on:
Model Shipwrights

The Coastal Motor Boat (CMB4),Imperial War Museum, Duxford

Luciano Satornetti (Littorio) took a recent trip to the Imperial War Museum, Duxford, and has provided us with this closer look at the CMB4 (Coastal Motor Boat).


Coastal Motor Boats (CMBs) were introduced into the Royal Navy during World War I. They had shallow draft and high speed: 35knots, and were designed to slip into enemy harbours, fire off one or two torpedoes and make a quick getaway. They were used in the 1917 Zebrugge action but CMB4, displayed for many years with a Victoria cross painted on the side at the Thornycroft works on Platts Eyot, earned its fame for its involvement in the British naval action in the Baltic in 1919. This was against the Russian ‘revolutionaries’, and it contributed significantly to the independence of the three Baltic states, Estonia, Latvia and Lithuania.

CMBs had been sent to the Baltic not only as fighting boats but also to land and take off British agents sent ashore to try and understand a confused situation. For this their crews wore civilian clothes.

However, the action which earned CMB4 its place in history arose when her captain, Lieutenant Augustus Agar, noticed there were ‘Red’ cruisers which could be attacked. On 17 June 1919 he took CMB4 with a crew of two: Sub-Lieutenant J Hampshier RNR and Chief Mort Mechanic Mr Beeley RNVR, all now in uniform again, towards Petrograd. When off Tolboukin Lighthouse he saw clearly a destroyer screen through which they had to pass to reach a position to fire at a cruiser.

He wrote later: ‘I throttled down to slow and crept ahead as we passed close to two destroyers. I could see black hulls and waited for the gun flashes. We were a “dead sitter” but, luckily for us, remained unseen’.

They then had a terrifying twenty minutes while they had to reload the firing pistol on their torpedo, which had been accidentally discharged. They could have been spotted at any moment but the Soviet look-outs were not too alert.

Agar continues: ‘Finally the job was done though the waiting seemed endless and nerve-wracking. Again I put on more speed and we were soon through the screen and in position. I fired our torpedo at the Oleg as if it were an ordinary practice run. I turned and made my way towards the Estonian coast hoping to mislead the enemy as to where we had come from. Within a minute there was a thick column of smoke from the Oleg. Flashes came from all directions, the forts, the destroyers and the ship itself, which were followed by splashes as the shells threw up columns of water soaking us to the skin. We were not far from Krasnaya Gorka when we turned north words the Finnish shore at 35 knots. The whole operation had occupied less than four hours.’

The Oleg sank in twelve minutes, albeit with the relatively small loss of only five of her crew. Two days later Lt Agar was flown over the area and was delighted to see her lying on her side. He was awarded the Victoria Cross. Hampshier was awarded the DSO and Beeley the Conspicuous Gallantry Medal.

After the action CMB4 was brought back to Britain where she was shown for a while at the Imperial War Museum and then returned to her makers who put her on display at Platt’s Eyot. When their works there closed she was passed back to the War Museum.
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About Luciano Satornetti (Littorio)
FROM: ENGLAND - SOUTH EAST, UNITED KINGDOM

Ok, firstly I build what ever takes my fancy however I mainly build 1/350 ships and 1/144 aircraft, all that said I also build naval and reconn 1/48 aircraft. To that if it was built by Hawker, Grumman or is a twin Bristol, Beaufighter etc but also including the Brisfit or was flown by VF-101 (now V...