View source for Line of Sight

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Currently, there are three known purposes for Line of Sight (LoS):
* Increasing success rate in the detection phase, which allows participation in aerial combat.
* A higher '''Fleet total LoS''' (FLoS) [http://kancolle.wikia.com/wiki/Artillery_Spotting#The_Trigger_Chance_of_Artillery_Spotting:_.28Beta_ver..29 positively correlates] with the trigger chance of [http://kancolle.wikia.com/wiki/Combat#Combat_Equipment_Setups artillery spotting] for a ship's double/cut-in attack in day battle. Fleet total LoS is simply the summation of all LoS stats from your ships, including bonus from the equipment.
* '''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 ([http://kancolle.wikia.com/wiki/World_2:_%E5%8D%97%E8%A5%BF%E8%AB%B8%E5%B3%B6%E6%B5%B7%E5%9F%9F#Stage_Guide_2 2-5], [http://kancolle.wikia.com/wiki/World_3:_%E5%8C%97%E6%96%B9%E6%B5%B7%E5%9F%9F#World_3-5_.E3.80.90Extra_Operation.E3.80.91_.E5.8C.97.E6.96.B9AL.E6.B5.B7.E5.9F.9F_Aleutian_Islands_Campaign 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.

== Effective Line of Sight (old formula) ==
* 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. '''
* You can make an exception to the above if your ships require other equipment for more damage, in which case you can make a DD/[[Yuubari]] a radar 'mule' to contribute to LoS by stacking radars.
* <s>ONLY Recon planes' (yellow & seaplanes) LoS values are doubled. LoS from carrier-based bomber planes (red & blue) are not doubled, but in fact square rooted. Avoid doubling dive bomber and torpedo bomber LoS values when calculating LoS.</s> [It is currently uncertain whether LOS from bombers contribute to Recon LOS (x2) or Fleet LOS (sqrt). Testing required.]
* ''You know you fulfilled the LoS requirement if you see a short animation with a seaplane flying to the node and back to your ship icon, plus the flagship's image appearing on-screen. Otherwise, you will be diverted off-course to a dead end without the animation playing.''

5:06-5:11 of this video here shows what the animation looks like: http://www.youtube.com/watch?v=J-x1tNuCeSE
* You can have a high''' total '''LoS and still fail the '''''effective LoS''''' requirement. '''<u>Do not use the total LoS as a guide.</u>'''

* If you have trouble reaching LoS requirements, take a look at the sortie page (for 2-5, 3-5) or other players' reports (for event maps) and adjust your equipment accordingly
=== (Events) Variations in effective LoS between players ===
During the Summer 2014 event, there were many player reports where players of similar HQ levels have differing effective LoS requirements, leading to confusion among many players. This hinted to a ''possibility'' that effective LoS scales to level. Do not be surprised if you level up or reach the next HQ bracket (e.g. HQ lvl 60-99, 100+) and fail to reach boss node when you did reach the node the previous sortie.

== Effective Line of Sight (new formula) ==
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)
* √(base LoS of each ship) x (1.69) = Calculate the square root of each ship's LoS (base value without any equipment) separately, then add the values together and multiply by 1.69
* Regarding the HQ Level: For example, if your HQ Lv. is 101~105, use 105. If it's 106~110, use 110. And so on.
Excel file that calculates the fleet's LOS for you: http://1drv.ms/1IlzXGX (courtesy of [[User:Kouma231|Kouma231]])[[Category:Game Mechanics]]