Instructions for bombing



Instructions for bombing


List of instruction for before take off, setting wind speed and direction, approaching the target area and other notes. On the reverse handwritten notes on bombing method including marking and other instructions instructions.


IBCC Digital Archive


Laura Morgan


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Two sides of document, typewritten on front and handwritten on back



SChattertonJ159568v10101, SChattertonJ159568v10100


[underlined] INSTRUCTIONS FOR BOMBING [/underlined]
[underlined] Before take of [sic], set:- [/underlined]
(i). Sea level pressure (at target).
ii). Target height.
.ii). Bomb T.V.
[underlined] Set wind speed and direction [/underlined]
(i) The wind speed should be reduced to "indicated" by subtracting 1 1/2 percent per 1000ft of height.
ii) Wind direction should be set true or magnetic according to whether the D.R. compass is set to read true or magnetic.
[underlined] Where approaching the target area:- [/underlined]
(i) Check that the george control is in the [underlined] out [/underlined] position. Otherwise there will be no suction to the computor [sic].
ii) Turn on the air supply.
.ii). Switch on the Graticule.
Take care not to press on any part of the sighting head, which is flexility wounded and can easily be moved enough to upset the course.
Give Pilot necessary instructions to bring the target down the drift line of the graticule, and release the bombs when the target reaches the cross line.
[underlined] Note. [/underlined]
(i) The collinator bracket handle can be used to move the graticule forward to pick up a distant target. As the sighting line is also rotated by the handle, however, it is most important that the handle is left free to take up its own position before deciding the moment of release.
(ii) Evasive action may be taken almost up to the point of release. Steady flight [bracket] level or glide [/bracket] for 8 or 10 seconds prior to the release of bombs is ample.
If necessary the bombs can be released in a turn, but the turn must be properly banked, otherwise considerable errors will be cause by side slip.
[page break]
A datum point approx 5mm s [indecipherable word] D will be marked with cascading long burning green TI for use of marker force.
1st wave A/e pass over target @ 0145, giving support to a flare force who will illuminate the AP, 1st wave must maintain track through target + when [underlined] clear [/underlined] of defences to orbit port to proceed round N edge of target to pt NW of target. [indecipherable word] will mark A pt with red spot fires, when marking complete main force will be called in to bomb.
1st wave turn into their bombing run, W of line running, N/S through AP before turning on to their, before turning on to their if order to bomb is delayed A/e are to fly to W of target from due west, after bombing leave on SE track before going to pos [position] J.
Weather 11/5
Long cascading green T.I. bursting 10,000 [indecipherable word]
Red/green [indecipherable word] heading [underlined] 075 [/underlined] rectified 165 mph only if ordered by code word between Z - 10 to Z. If enemy [insert - repeated below]
If enemy imitate red spot fires, cascading TI green.
Other attacks Loan, Dusseldorf
[insert calculations]
5318 x 0505 (A) 5240 x 0700 (B) 5240 x 0800 (C) 5210 x 0930 (D)
Target - 5215 x 1045 (H) 5515 x 1030 (J) 5200 x 0930 (K) - C – B 5340 x 0530 (E) Base


“Instructions for bombing,” IBCC Digital Archive, accessed September 23, 2020,

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