User blog:AbsoluteLuck/In depth analysis of ASW

Overview
Most people have been told that ASW stat has little impact on ASW damage, while equipment makes a significant difference. However, ASW is a little complicated to calculate. Therefore, in this blog I will quickly discuss how ASW is calculated and recommended set-ups. This is important since Submarine Princess has appeared in two consecutive events and will undoubtedly continue to appear in the future.

Definitions
According to our combat page, ASW is calculated by:

ASW Daytime Cap is 100

Head-on has a damage modifier of .8 while Parallel has a damage modifier of 1.

Line Abreast has a ASW modifier of 1.3

Sonar and Depth Charge upgrades add √(★) ASW.

To simplify calculations, I will use 64 as the base ship ASW.

3-Slot Calculations
Surprisingly, ASW cap is easy to reach in Parallel but very difficult to reach in Head-on.

For example, assuming you have a 3-Slot DD/CL with 2 Type 3 Active Sonars and 1 Type 3 Depth Charge Projector:

ASW Pre-cap in Parallel: [2*√(64) (ship ASW) + 1.5*28 (equipment) + 0 (upgrades) + 13 (type)] * 1.15 (dc+sonar) * 1.3 (line abreast) = 106.145

ASW Pre-cap in Head-on: [2*√(64) (ship ASW) + 1.5*28 (equipment) + 0 (upgrades) + 13 (type)] * 1.15 (dc+sonar) * 1.3 (line abreast) * .8 (head-on) = 84.916.

Even max modded equipment would only add 9.48 ASW, summing to 94.4 ASW. Therefore to reach ASW cap in head-on, we need to use modded Type 4 Passive Sonars.

ASW Pre-cap in Head-on: [2*√(64) (ship ASW) + 1.5*32 (equipment) + 7 (upgrades) + 13 (type)] * 1.15 (dc+sonar) * 1.3 (line abreast) * .8 (head-on) = 100.464

4-Slot Calculations
A 4th slot is extremely powerful because it adds a significant amount of ASW. In fact, 4 slot ASW ships can hit head-on ASW cap fairly easily.

For example, assuming you have a 4-Slot CL/CT with 3 Type 3 Active Sonars and 1 Type 3 Depth Charge Projector:

ASW Pre-cap in Head-on: [2*√(64) (ship ASW) + 1.5*38 (equipment) + 0 (upgrades) + 13 (type)] * 1.15 (dc+sonar) * 1.3 (line abreast) * .8 (head-on) = 102.856

Unfortunately, because Ooyodo has terrible ASW stats, she actually requires a single star on two equips to hit head-on ASW cap.

Conclusion
Since almost, if not all, ASW focused maps allow saiun, our goal should be to hit ASW cap in head-on. By using the recommended equipment set-ups, we can reach this goal and improve our chances in difficult ASW maps