Combat/Opening Anti-Submarine Warfare

Introduction

During the opening phases of combat, ships which meet certain requirements are able to perform opening ASW attacks. These attacks are valuable because they have the opportunity to sink submarines before they get the chance to perform opening torpedoes.

Overview

1. All ships with an ASW stat are capable of performing OASW.

2. Upgrades to ASW equipment are not counted towards the thresholds for triggering OASW.

3. OASW attacks are performed in range order.

• Attacks from ships with the same range are random.

4. Damage is calculated the same way as normal ASW.

Trigger Requirements

Ship	Requirement
All ASW capable ships	100≤ ASW
Destroyer Escorts	Either: 60≤ ASW with sonar 75≤ ASW with equipment that has 4≤ ASW
Isuzu Kai Ni Tatsuta Kai Ni Jervis Kai Janus Kai Samuel B. Roberts Kai Fletcher Johnston	Default OASW regardless of ASW stat or equipment.
Taiyou Shinyou Gambier Bay Zuihou Kai Ni B	Have both: 65≤ ASW At least 1 plane with 7≤ ASW
Taiyou Kai/Kai Ni Shinyou Kai Kai Ni	65≤ ASW
Hyuuga Kai Ni	Either: 2 Autogyros 1 Helicopter