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Remembered Today:

Meaning of markings on trench map


Marco

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Could someone tell me what the numbered points are on the map below? Are they reference points? For what? They are in the British frontline so artillery rerefence points would be unlikely. Not?

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forum89.jpg

TIA!

Regards,

Marco

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Could someone tell me what the numbered points are on the map below? Are they reference points? For what? They are in the British frontline so artillery rerefence points would be unlikely. Not?

forum88.jpg

forum89.jpg

TIA!

Regards,

Marco

They're trench references. It's what the trenches were referred to in orders, war diaries, etc so the reader knew exactly which trench was being referred to. They had other names "on the ground", but could also referred to as these references.

Dave.

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Dave - How do you get to N.20.2 for example? What is the N, the 20 and 2? North? And why do the fraction of number move away from center? I mean shouldn't it be 20.1, 20.2, 20.3, - 20.9, 21.1, 21.2, etc? In the above map 20.1 and 21.7 are next to each other and the number decrease from there out towards the flanks.

Andy

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Could someone tell me what the numbered points are on the map below? Are they reference points? For what? They are in the British frontline so artillery rerefence points would be unlikely. Not?

forum88.jpg

forum89.jpg

TIA!

Regards,

Marco

The N probably stands for that portion of the front. f.i. Northern salient of Ypres is C, South of Menin road is I. You will probably see it somewhere mentioned on your trench map as a large letter. Than the number following this refers to the number of that particular square on your trench map, areas were mapped out in squares to make it easier to provide artillery coordinates. So you get N.21. Than they number each front line trench in that particular square, from east to West, that's where your last number comes from. I hope this explanation is not too confusing.

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Dave - How do you get to N.20.2 for example? What is the N, the 20 and 2? North? And why do the fraction of number move away from center? I mean shouldn't it be 20.1, 20.2, 20.3, - 20.9, 21.1, 21.2, etc? In the above map 20.1 and 21.7 are next to each other and the number decrease from there out towards the flanks.

Andy

They're simply trench numbers, not grid references. The "N", as Bert has mentioned, refers to the grid square "N" which encompasses (usually) 30 numbered smaller grid squares. Shown on the extract is square 21 and part of 20 which is why the trenches in square 21, for example, are trench "N.21." then the number of the particular trench section.

Dave.

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I have noticed that these types of notation seem to have been more common early in war, say to 1916, but thereafter became less common. I speculate that Army staff officers struggling to come to terms with trench warfare, perhaps overorganized things a bit. I suspect that a major trench, such as N.20 , was meant to be a battalion front, and the systematic coding from left to right (and front to rear!) was meant to encourage clarity and understanding.

The drawback, to my mind, was the fact that if the line moved forward or back a few hundred yards, the whole system was thrown out of whack, requiring a complete re-do, with associated confusion. From 1917, most operational orders I have seen referred to trenches by their common names (for example "QUMQUAT trench") delimited by standard map coordinates.

I am sure others have noticed examples contradicting what I have just said!

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f.i. Northern salient of Ypres is C, South of Menin road is I.

It's not quite a simple as that, Bert, but I know what you mean.

(The frontline prior to 31st July 1917 in the ypres Salient ran through grid squares "T", "B", "C", "I", "J", back into "I", "O", "N", a little bit in "T" then "U" as it went past Ploegsteert into "C" and "I" beyond Armentieres, etc. etc.)

Dave.

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I am sure others have noticed examples contradicting what I have just said!

Sorry, but yes I have! :ph34r:

You are correct that this method was used on many of the earlier maps, but the system was used as late as September 1918. The idea was that it would be less confusing (and more accurate) to use a trench reference which only denoted a short stretch of front rather than a trench name which could describe an area of up to several miles in length. Occasionally, you can also see the German front trenches denoted in a similar manner.

Dave.

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They're simply trench numbers, not grid references. The "N", as Bert has mentioned, refers to the grid square "N" which encompasses (usually) 30 numbered smaller grid squares. Shown on the extract is square 21 and part of 20 which is why the trenches in square 21, for example, are trench "N.21." then the number of the particular trench section.

Dave.

Ok... that makes sense... what seems odd though is the trenches are marked sequentially from right to left rather than the more customary left to right. Am I seeing this right, is there a reason for that?

Andy

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Ok... that makes sense... what seems odd though is the trenches are marked sequentially from right to left rather than the more customary left to right. Am I seeing this right, is there a reason for that?

Andy

I'm not 100% certain on this (never thought about it before, to be honest!), but I'd hazard a guess that it stems back to the old British Army "right of the line" mentality (in other words, on the western front of 1914-18 - the numbering would run from south to north).

Dave.

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I'm not 100% certain on this (never thought about it before, to be honest!),

OMG Dave have I stumped you on a map question? YES! :lol:

Andy

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OMG Dave have I stumped you on a map question? YES! :lol:

Andy

Well, you do seem to ask the questions that I hadn't though of , Andy!!! :lol:

I've had a good innings so far, wouldn't you agree? I might be correct (75% certain) on this one yet!!! I'll certainly find out for you, though!

Dave. :D

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