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Originally Posted by p7p8
I disagree because previous legs are impotrant for better solutonas and predicting speed (even without DEMON work). Also merged contacts from different sensors gives you "not clear" picture.
I had in mind taht you needs some experience for estimating which legs/dots are important for good solution.
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edit> Nice tutorial video against a straight running surface ship. Your use of the Narrowband screen was great. I'd love to see one of your manual TMA videos against a maneuvering enemy sub at depth however. Do you have a YouTube channel? If so, could you link it?
Straight out of the RedBook pg 14
Quote:
VI. TMA - TRACKING ON A DUAL ARRAY
1.6.1 For tracking targets on a dual array, the techniques to acquire an accurate solution discussed up to this point need not apply. A dual array contact, or master contact, represents truth at all times. As such, this is the most desirable of all the TMA techniques as it is an instantaneous, accurate solution and cannot be foiled by target zigs. It is still prudent to keep the target on your beam, in a lag line of sight, for evasion purposes (see Chapter 3: Tactics).
1.6.2 It doesn't matter how much your target zigs, you will always know exactly where he is by ensuring the two most recent tick marks of the ruler fall on the two most recent intersections of your dual array bearings. It is not imperative that you get the "straight dot stack" here, you know where he is at and you know his course, and thus his range, from the two most recent intersections of your dual array bearings. Just ensure that the two most recent tick marks of the ruler fall on the two most recent bearing lines; forcing the top two dots to be in a straight line on the zero error line.
1.6.3 Dual Array bearings are typically purple and white lines. The purple lines represent bearings that are being attained from your towed array and the white lines represent bearings being attained from your spherical array. Additionally, you can have dual array contact with your hull array and either your spherical or towed array - though rare. In fact, if your hull array holds the target, then your spherical and towed array most certainly hold the target as well, assuming you have the target exposed to these arrays. Thus, you could have a three array contact. Same principles still apply - where the bearing lines of the various arrays intersect is where the target was at the time those bearing lines were laid down. Refer to Figure 1.6.3 as an illustration.
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See the RedBook pg 13 for the Figure 1.6.3 referred to above. It basically shows the dual array hits as a sequence of
triangulations which when connected together form a pretty accurate solution based on just the last two or three hits of the TMA sequence.
The above makes perfect sense to me. Now what happens after Torps are in the water is a different discussion, but the TMA solution offered above by dual-array contacts on just the last two or three hits is perfectly valid.