(Translated from Steel Ocean Forum on Baidu, Original Author:Ge Bi Lao Wang)

How Dectiction and Hiding values effect Scouting and Spotting explaned below.

1. All ships have a natural Hiding Factor(HF).

This factor is directly multiplied by the opposite side’s Theoretical Scout Range(TSR) and get the Actual Detected Range(ADR).

The calculating formula: ADR = TSR*(1-HF)

In case of Shiratsuyu (IJN tier 5 DD), its HF is about 0.42. That is to say a Shiratsuyu at full stop will be detected by any ship with the TSR of 5000m in 2900m distance.

2. Ship Paint increases camouflage effect by 300m. It is calculated before the HF.

The calculating formula: ADR adding coating = (TSR-300)*(1-HF)

In case of Shiratsuyu again, if it is painted, the ADR = (5000-300) x (1-0.42) =2700m

3. The Commanders’ Disguise Effect(CDE) acts on the HF.

The calculating formula: ADR = TSR*{1- (HF + CDE)}

Without paint the Shiratsuyu as an example, if it has the Commander Felix Von Luckner (Elite, which has the Enchanced Disguise II skill will increases disguise by 2%), its ADR is about 2600m.

4. According to the Moving speed, there is a Hiding Penalty of Moving (HPM)

The calculating formula: ADR = TSR*(1-HF+HPM)

The penalty from slow to fast, level 1 is 2%, level 2 is 4%, level 3 is 6%, level 4 is 8%.

The Shiratsuyu, if it moves ahead at half speed, then the enemy with a TSR of 5000m will detect the Shiratsuys at a distance of 3100m.

5. Hiding penalty of firing(HPF)

The calculating formula: ADR =TSR*(1-HF+HPF)

Different weapons hava different HPF.
Take the destroyer as an example:
Main Gun penalty (whether shooting full salvo or single salvo) is 10%.
Torpedo launching penalty 6%
Air defense weapon penalty 2%

In case of Shiratsuyu, when it fires motionless, the enemy with 5000m TSR will see it in 3400m.

6. Smoke bombs provide the HF which decreases from 100% to 0% from the center to the edge of the smoke area.

Due to the speciality of smoke bombs, the calculation formula of firing and moving in smoke bombs will be different. Simple multiplication does not apply.

7. Commander Skill:

Cunning (Kimura Kazo,Mikasa Shotaro) and EMI Disruption (Kimura Kazo)’s effect is directly multiplied.

For example, an original (no accessories leveling up) Shiratsuyu loses detected distance 3400-2900=500m

When cunning is actived, loss of range is reduced by 15%, that is 500*(1-15%)=425m.

So the ADR after firing is changed from 3400 m to 3300m (However, no eggs....)

Survival instincts (Yakanama Arashi), Forthright (Yamamoto Yisoroku), Foresight(Kobayashi Yula) and the like initiative to increase the visual skills are calculated in accordance with the law of multiplication with the HF. Such as, after the activation of the Yakanama Arashi’s Survival instincts, the DDs’ general HF is 50%, so it increases the scouting range by 150 meters for DDS. While for BBs’ HF of 20%, you can increase the range of 240 meters.

8. The Equipment (Range Finder)’s affect is added to TSR simply.

To sum up, the final calculating formula is ADR=(TSR+Enemy’s Range Finder+Enemy’s Commander Skill-coating)*(1-HF-HF from commanders+HPM+HPF)