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* '''Effective LoS '''(ELoS), which allows the fleet to reach a specific node (usually a pre-boss or boss node) instead of being diverted to a dead end. Effective LoS is employed in special maps, such as [[Events|event maps]] and extra operations maps ([[World 2#2-5|2-5]], [[World_3#3-5|3-5]]).
 
* '''Effective LoS '''(ELoS), which allows the fleet to reach a specific node (usually a pre-boss or boss node) instead of being diverted to a dead end. Effective LoS is employed in special maps, such as [[Events|event maps]] and extra operations maps ([[World 2#2-5|2-5]], [[World_3#3-5|3-5]]).
 
* There are special formula being used to calculate ELoS. As a general consensus, LoS bonus from equipment (esp. recon planes) are more important than individual ship's LoS stats.
 
* There are special formula being used to calculate ELoS. As a general consensus, LoS bonus from equipment (esp. recon planes) are more important than individual ship's LoS stats.
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===Formula 33===
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Similar to the New Fall Simplified formula, but reportedly more accurate. Using this model, a value of 31 eLoS would guarantee failing the 2-5 LoS check, while a value of 33 eLoS would succeed 100% of the time. It is described as follows<ref>http://ja.kancolle.wikia.com/wiki/%E3%83%9E%E3%83%83%E3%83%97%E7%B4%A2%E6%95%B5</ref>:
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<math>
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\begin{align}
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\phi &= \sum_{s \in \text{Ships}} \sqrt{L_s} + C_{n} \sum_{l \in \text{Slots}}C_{l} ( S_{l} + S_l^{\star} ) - \lceil 0.4 H \rceil + 2M \\
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S_l^{\star} &= C_l^{\star} \cdot \sqrt{\bigstar_l}
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\end{align}
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</math>
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*<math>L_s</math> is the ship's base LoS
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*<math>C_{n}</math> is the node factor, it represents the weighting of the formula that is '''known to vary''' across different maps and nodes. For example, in 6-2, the node factor of C<sub>n</sub> = 3 means that equipment is 3 times as important compared to the original formula (as tested in 6-2-F/H). See following section for more details.
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*<math>C_{l}</math> is the equipment multiplier:
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**Carrier-Based Fighter: 0.6
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**Carrier-Based Dive Bomber: 0.6
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**Carrier-Based Torpedo Bomber: 0.8
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**Carrier-Based Reconnaissance Aircraft: 1
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**Reconnaissance Seaplane: 1.2
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**Seaplane Bomber: 1.1
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**Small Radar: 0.6
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**Large Radar: 0.6
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**ASW Patrol Aircraft: 0.6
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**Searchlight (Small and Large): 0.6
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**Fleet Command Facility: 0.6
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**SCAMP: 0.6
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**Skilled Lookouts: 0.6
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**Sonar: 0.6
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**Large Flying Boat: 0.6
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**Seaplane Fighter: 0.6
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*<math>S_{l}</math> is the displayed LoS value of the equipment
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*<math>S_l^{\star}</math> is the equipment's improvement bonus to eLoS
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**This is calculated by multiplying <math>C_l^{\star}</math>, the improvement multiplier of that equipment, with the square root of the equipment's improvement level.
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***The improvement multiplier of Small Radars is 1.25, Large Radars is 1.4, Reconnaissance Seaplanes is 1.2, and Searchlight is 0 (that is, it receives no eLoS bonus when improved)
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*<math>H</math> is the HQ level. The ceil operation means that the value is rounded up every 2.5 HQ levels.
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*<math>M</math> is an additional variable representing the number of empty ship slots in your fleet. For instance, if your fleet contains only 2 ships, <math>M</math> would be 4 and thus <math>2M</math> would yield 8.
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**It is unknown whether this value increases mid-sortie if a ship disappears from your fleet (e.g. sinking).
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====Equipment LoS weighting modifier====
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*Also known as node factor
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*In some maps, weighting of equipment would be higher than that others.
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*It is represented as C<sub>n</sub> in the formula.
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*For all tested nodes, C<sub>n</sub> for 2-5 is 1, for 3-5 and 6-1 are 4, for 6-2 and 6-3 are 3.
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**That mean equipment LoS are 3 times more important in 6-2 and 6-3 compare to 2-5 and four time as important in 3-5 and 6-1.
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**In other words, ship LoS are less effective in those maps with higher equipment weighting modifier.
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*In 2-5, F33(C<sub>n</sub>=1) have to be larger than 31 to have a chance to enter boss and 33 to guarantee boss entry.
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*In 6-2, F33(C<sub>n</sub>=3) have to be less than 43 to guarantee F>H and more than 40 to guarantee H>K
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== Effective Line of Sight (old formula) ==
 
== Effective Line of Sight (old formula) ==
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* '''OUTDATED AND SHOULD NOT BE USED'''
 
* Effective LoS = Recon LoS×2 + Radar LoS + √(Fleet total LoS - Recon LoS - Radar LoS). This is the formula used since Spring 2014 event; in 2-5, 3-5 boss node, and any node with the seaplane-searching animation.
 
* Effective LoS = Recon LoS×2 + Radar LoS + √(Fleet total LoS - Recon LoS - Radar LoS). This is the formula used since Spring 2014 event; in 2-5, 3-5 boss node, and any node with the seaplane-searching animation.
 
* '''Due to the formula, recon planes will contribute more to effective LoS than radars. For the purposes of fulfilling effective LoS, avoid using radars that do not give at least +10 LoS. '''
 
* '''Due to the formula, recon planes will contribute more to effective LoS than radars. For the purposes of fulfilling effective LoS, avoid using radars that do not give at least +10 LoS. '''
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== Effective Line of Sight (new formula) ==
 
== Effective Line of Sight (new formula) ==
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*'''DEPRECATED, RECOMMENDED NOT TO USE'''
 
With the advent of the 2014 Fall Event a new formula for Effective LoS has been devised to account for inconsistencies of the old formula. ([http://wikiwiki.jp/kancolle/?%C6%EE%C0%BE%BD%F4%C5%E7%B3%A4%B0%E8#area5 Source 1]) ([http://ch.nicovideo.jp/biikame/blomaga/ar663428 Source 2])
 
With the advent of the 2014 Fall Event a new formula for Effective LoS has been devised to account for inconsistencies of the old formula. ([http://wikiwiki.jp/kancolle/?%C6%EE%C0%BE%BD%F4%C5%E7%B3%A4%B0%E8#area5 Source 1]) ([http://ch.nicovideo.jp/biikame/blomaga/ar663428 Source 2])
 
* Effective LoS = Dive Bomber LoS x (1.04) + Torpedo Bomber LoS x (1.37) + Carrier-based Recon Plane LoS x (1.66) + Recon Seaplane LoS x (2.00) + Seaplane Bomber LoS x (1.78) + Small Radar LoS x (1.00) + Large Radar LoS x (0.99) + Searchlight LoS x (0.91) + √(base LoS of each ship) x (1.69) + (HQ Lv. rounded up to the next multiple of 5) x (-0.61)
 
* Effective LoS = Dive Bomber LoS x (1.04) + Torpedo Bomber LoS x (1.37) + Carrier-based Recon Plane LoS x (1.66) + Recon Seaplane LoS x (2.00) + Seaplane Bomber LoS x (1.78) + Small Radar LoS x (1.00) + Large Radar LoS x (0.99) + Searchlight LoS x (0.91) + √(base LoS of each ship) x (1.69) + (HQ Lv. rounded up to the next multiple of 5) x (-0.61)
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