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OCR Page 1 of 15NOTES ON EMPLOYMEMT OF GAS SHELL
1. use nstantaneous fuses-French IAL or I--- Amorican Mark III
2. Secure largest angle of foll possible.
3. Only fire gas shell under the most favorable weather conditions
40 Sofety zones;
Wind blowing towards enemy Towards our lines
Nor--persistents
Small cuantities
300 Meters
1000 Meters
Large cuantities
300 Meters
2000 Meters
Persistents
Small quantities
1000 Meters
1000 Meters
Large cuantities
2000 Meters
2000 Meters
FIRE FOR ADJUSTMENT
1. Special smoke shell or H.E. sholls are to be used for ranging
2. Use range tables for H. 0. I. sholl with long fuse wherever special
tables for gas shell are not provided.
3. Accuracy of fire is essential - correct for differences in weight
when substituting gas Shell for H.E. or smoke shell.
4. Secure enfilade fire whenever possible.
NATIONAL
With non-persistents;
ARCHIVES AND
WECORDS
SERVICE'
5. Seek narrow bracket; if there is no wind adopt -mean angle of
elevation of bracket in fire for offect, If there is a wind
modify the mean angle of elevation by 1/6 fork to the windward.
With persistents;
6. Seek narrow bracket and adopt mean angle of elevation regardless
of wind direction.
FIRE FOR EFFECT.
1. H. E. or Shrapnel should accompany gas shell whenever possible.
They add to the confusion of the onemy and camouflage the use of.
gas. They do not appreciably dissipate gas clouds.
2. Distribute guns over torget front as in fire for effect with H.E.
3. With non-persistents;
Execute precision fire, On targets of depth repeat fire every 100
meters in depth.
With persistents.
Execute zone fire.
USE OF SMOKE.
Under normal conditions curtain a front with smoke screen by
?iring;
75mm Gun
2 rounds per 10 meters per min.
4.7" Gun 2 rounds per 15 meters per min.
Maintain curtain by adding smoll quantities at frequent intervals
Smoke screens must be carefully controlled and adjusted to wind
conditions.
EXPENDITURE OF AMMUNITION.
on-persistents;
termine range and front of objective.
termine artillery available.
intersection of the range ordinate and the curve for the
chosen.
oject to the right and read number of guns required for each
fifty meters front firing at "R" rate of fire.
2.
Terms
Subject
World War, 1914-1918
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