It's strange indeed if you are not familiar with the N3 version of Triangulated fire. But here's another way to rationalize it: In order to perform your BS attack, you need to know the B value. Since the previous sentence stated to ignore all other MODs for your BS attack, this sentence was added to avoid confusion. On the other hand, you don't need to know the damage value (or MODs that modify it) to perform a BS attack.
I'm afraid I'm getting lost with your argument and it creates more confusion, I don't understand what having to know the value of something during the declaration has to do with whether or not MODs can be applied to that something in the resolution?
I'm not a native English speaker, so I might not be able to express my argument precisely enough. I'll try again in a more simple manner, please don't take it as being patronising, I just want to make sure to get the point across. My point was that the rule revolves around performing a BS attack and in order to perform (not declare) that attack, you need to roll dice. When you roll dice, you need to know how many you have to roll, according to the B value. Once you have that info, you can perform your BS attack. You then resolve the FTF and the BS attack has been concluded. Here the relevancy of the rules for Marksmanship and Triangulated fire end. The passus about Burst not being affected is there because it is part of the BS attack sequence, while the (possible) modification of the Damage value is not. It's a separate action that needs to be performed according to different parameters, so they didn't include a passus for it.
Don't worry, I'm not a native English speaker either, so I understand you perfectly. In your new explanation, which seemed very good to me, I see a new point of discrepancy because I don't think that the Save Roll is something different from the BS Attack, it is something different from the BS Roll (which is also part of the BS Attack), but for me the BS Attack is a whole that is made up of the declaration, the resolution (here the BS Roll would be) and the effects (and here the Salvation Roll would be). The rule speaks of a BS Attack that ignores MODs except one expressly indicated to B. so if the «Attack» is made up of several rolls (BS Roll, Saving Roll and Guts Roll if necessary) ignoring MODs applies to all rolls... and that is why it is specified that there is a MOD that does apply. I can be wrong? Well yes it can be. We really enjoy the game even if we sometimes misapply the rules, but if we do, we want to learn why we're doing it wrong so we can correct it and understand how the game works (which for us is part of the fun). That's why I'm so insistent on rule threads, to understand if we're doing something wrong why we're doing it wrong; but invariably the result is «the rule is like that because it is like that» which for us translates into «I think it is like that, so it has to be like that even if I have no idea why it is like that or any argument to defend that it is like that». Another point that does not help much to understand the game well is the writing of the rules because on many occasions what is intended to be written is not what is written, which only creates more confusion. For example, the case we are dealing with, if they really wanted to indicate that only MODs to BS are ignored, it is as easy as removing a phrase (which by the way was not in the N3 rules) and adding just two letters (in bold) and leave it like that Allows the user to declare a BS Attack with one of his BS Weapons against a target within LoF by making a BS-3 Roll, ignoring all other BS MODs (Range, Cover, Special Skills such as Mimetism...). [Edit] I would even remove the part of the rule that is crossed out, I think that making a BS attack with a BS weapon that the troop does not have, is not included anywhere in the rulebook, unless there is a rule of "arms loan" that I don't know. ¬¬
Again. The rules say a ROLL for a BS Attack that ignores MODS. A ROLL. That roll. I'm not a native speaker too, but when someone explain something to me i tend to listen...
Rolls do not ignore MODs, nor do they even apply them. MODs are applied, or ignored, to the Attribute values of the troop or to the B or Damage value of a weapon before the roll is done to obtain the value to be the target of the roll (a.k.a.Success Value). When someone explain something about rules, it is convenient to at least know how the rules work.
I agree that the terminology is perhaps needlessly convoluted here and I do see your point regarding the structure of the order expenditure sequence. After reviewing the wiki again, however, I found this: Modifiers (MOD) In most cases, the circumstances of an action apply Modifiers (MODs) to the relevant Attribute before a roll is made. MODs, by increasing or decreasing the numeric value of an Attribute, denote the difficulty of the Skill at hand. A positive MOD applies when the Skill performed is easier than usual, and a negative MOD makes the Skill harder than usual. Modifiers (MOD) Both during the Active and Reactive Turns, there may be Modifiers (MODs) that affect the Burst (B). They are applied when declaring the Attack. There are also MODs to the Attack Rolls, which are applied in the Resolution step of the Order. These MODs are explained in the sections for their respective Types of Combat (BS, CC, or Hacking). It seems like there are different kinds of MODs that are applied to different elements, either to the attribute or to the roll. Some applied during declaration, others during resolution. This would explain why Triangulated Fire is phrased the way it is, specifically saying "making a BS-3 Roll, ignoring all other MODs".
Look, that may be an acceptable argument and well explained, not like the «because potato» that is so common in this forum.
