This page is for "Effective Line of Sight" (ELoS), also called "Fleet LoS", as it pertains to branching requirements. Certain maps require the fleet to hit a certain LoS threshold in order to get routed to the boss or pre-boss. As a rule LoS from equipment is more important than ship LoS when determining ELoS.

For details on the LoS stat, please see Stats.

Calculating LoS

Formula 33

Formula 33, sometimes referred to as F33 is the most accurate "Fleet LoS" calculation formula known. It is described as follows^[1]:

LoS Formula 33

[math]\displaystyle{ \begin{align} \text{Fleet}_\text{LoS} &= \sum_{s \in \text{Ships} } \sqrt{Ship_\text{LoS} } + C_{n} \sum_{e \in \text{Equipment} }C_{e} ( S_{e} + S_e^{\star} ) - \lceil Q \times HQ_\text{Lv} \rceil + 2M \\ S_e^{\star} &= C_e^{\star} \cdot \sqrt{\bigstar_e} \end{align} }[/math]

With

[math]\displaystyle{ Ship_\text{LoS} }[/math] the ship's base LoS .
- Total LoS of visible fit bonuses should be added to this part, unlike equipment improvement bonuses.
[math]\displaystyle{ C_{n} }[/math] the Node factor, it represents the weighting of the formula that is known to vary across different maps and nodes. See following section for more details.
[math]\displaystyle{ C_{e} }[/math] the equipment multiplier (see bellow),
[math]\displaystyle{ S_{e} }[/math] the displayed LoS value of the equipment, excluding visible fit bonus,
[math]\displaystyle{ S_e^{\star} }[/math] the equipment's Improvement bonus to equipment LoS (see [math]\displaystyle{ C_l^{\star} }[/math] bellow),
[math]\displaystyle{ C_e^{\star} }[/math] is the improvement modifier of the equipment, see table bellow.
[math]\displaystyle{ \bigstar_e }[/math] is the improvement level of the equipment.
[math]\displaystyle{ Q }[/math] the HQ level modifier, varying depending on the map:
- 0.35 on 5-2 and 6-3.
- 0.4 otherwise.
[math]\displaystyle{ HQ_\text{Lv} }[/math] the HQ level.

[math]\displaystyle{ M }[/math] the number of empty ship slots in the fleet:
- 0 for 6 ships fleet,
- +1 increase per missing ship,
  - This value can increase mid-sortie if a ship is sunk or evacuated.
- -1 for a full Striking Force Fleet (7 ships).

Notes

Equipment LoS weight more than ship LoS.

Equipment Types

Equipment type		[math]\displaystyle{ C_{e} }[/math]	[math]\displaystyle{ C_e^{\star} }[/math]
Recon	Seaplane Recons	1.2	1.2
Bomber	Seaplane Bombers	1.1	1.1
	Carrier Recons	1	1.2
	Torpedo Bombers	0.8	0
	Fighter	0.6
	Dive Bombers
	Seaplane Fighters
	Liaison Aircraft
	Large Flying Boats		1.2
Small	Small Radars		1.25
Large	Large Radars		1.4
	Sonars		0
	Searchlights
	Skilled Lookouts
	Aviation Personnel
	Command Facilities
	Submarine Equipment
	Landing Craft
Minisub	Midget Submarines
	Small Caliber Main Guns

Other equipment types are speculated to be:^[2]

[math]\displaystyle{ C_{e}=0.6 }[/math]
[math]\displaystyle{ C_e^{\star}=0 }[/math]

Equipment LoS weighting modifier

Also known as node factor.
Depending on the map, equipment is weighted with more importance.
It is denoted as C_n in the formula.
See the table below for C_n values used by each map.
Ship LoS is less effective in those maps with higher equipment weight modifiers.

Estimated LoS

Data sourced from TsunDB. Values are the lowest and highest reported LoS for routing. Please note that there may be some margin of error due to random routing.

Map	C_n	Origin Node	Lower Threshold	Upper Threshold	Destination Node	Fail Destination	Notes
1-6	3	M	29.7	159.6	J	L	Not meeting composition requirements also routes to L.
2-5	1	G	37.3	87.8	L	K
		I	31.2	59.4	O	H
		J	42.4	91.2	O	H
3-5	4	G	24	337	K	I
3-5	4	H	39.1	321.4	K	J
7-2	??	E	-32.1	136.5	G	F	Appears to be fixed routing based on composition but still plays the LoS routing animation.
7-2	4	I	66.1	294.5	M	L
7-4	??	G	??	??	L	F
	??	E	??	??	K/P	L	Not meeting composition requirements also routes to L.
	4	M	50?	??	O	N	Not meeting composition requirements also routes to N or P.
7-5	4	O	57	??	M	L
7-5	4	P	58	??	T/R	S	Composition determines the T/R route.
4-5	2	K	64.8	146.5	T	L
	2	Q	62	167	N/O	P	Low number of reports.
	??	O	62	167	T	N	Appears to be fixed routing based on composition but still plays the LoS routing animation.
5-2	2	F	64	147	O	H
5-2	2	L	73.8	81	K	N	Low number of reports.
5-4	2	L	57	185	P	N
5-4	2	M	42.3	150.1	P	O
5-5	2	O	63.8	134.5	S	R
5-5	2	P	74.4	167.7	S	Q
6-1	4	G	16.7	218.1	H	I
		H (With AS)	25.4	201.4	K	E
		H (Without AS)	23.3	218.1	K	E
6-2	3	E	46	179.8	J	I
		H	42.8	42.8	K	G	Low number of reports.
		I	35.7	205.8	K	G
6-3	3	E	19.4	180	G	F	Routing is heavily influenced by composition as well.
6-5	3	G	56.3	196.2	M	K
6-5	??	J	37.2	193	M	L	Appears to be fixed routing based on composition but still plays the LoS routing animation.

LBAS LoS

Unlike ship mechanics, LBAS do not need/utilize the LoS stat and so this stat is mostly useless.

The only use for LoS is for "Defense Fighter-Power" in air defense mode, where it determines the "Reconnaissance Defense Bonus" ([math]\displaystyle{ \text{Mod}_\text{recon} }[/math]) for Recon Seaplane Recons, Large Flying Boats, and LB Land-based Recons:

Reconnaissance Defense Bonus
LoS	ReconSeaplane Large Flying Boat	Carrier-based	LBLand-Based
≥9	1.16	1.3	1.24
8	1.13	-	1.18
≤7	1.1	1.2	-

The LoS on all other aircraft or in other LBAS modes is not counted.

FAQ

Q: Why do I keep getting offrouted?

A: Double check that your fleet LoS according to relevant formula meets the LoS threshold for the map. Viewers such as KanColle Command Center Kai, Poi Viewer, KCANotify, KanColle Viewer and Electronic Observer can calculate your fleet's LoS easily for you.

Q: How do I increase my LoS?

A: Reconnaissance seaplanes are the fastest way to raise LoS. The other easy way is to stack radars. Upgrades to reconnaissance seaplanes are also a good way to increase LoS when slots are limited. It is not recommended to stack carrier-based recons or seaplane bombers because too many can compromise the combat ability of your fleet. Another way is to level your ships. Because LoS increases as you level, marrying your ships means their LoS stat can go even higher.

Q: I had enough LoS, how did I get off routed?

A: Planes that are wiped out no longer contribute to LoS. If you were depending on bombers to hit the LoS threshold, you can fall under the threshold when encountering heavy enemy anti-air.

Line of Sight

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