H2S
H2S was a navigation aid to identify the target at night. It was to provide a radar image of the ground and allow navigators to pinpoint where they were on a raid. You judge the effectiveness by the H2S photos compared to the map.
A Type 184 indicator and Type 207 switch unit used in an H2S Mk IIB installation positioned at the navigator's position in a Lancaster |
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Dusseldorf taken 2/3 Nov 44. The majority of H2S images over the Rhur were nothing more than an unhelpful blob. One problem that constantly plagued Bomber Command was finding the target. |
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This is the same area of Dusseldorf taken on 17/18 Dec 44. The image was more distinct. |
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Hamburg, being near the coast, with the Elbe River, Aussen Alster and the docklands giving a distinctive return. A good H2S target. |
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Image of Oslo Fjord taking during an anti shipping strike on 13/14 Dec 1944 |
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A example showing Trondhjem, which is the big white area in the centre. |