It tracks your average damage over the last 100 Random Battles on destroyers. That is separate from national emblems (top-3 XP wins) and from ranked or clan marks.

Published steps (confirm in the live client) are roughly: Third ~33,000 on DD VIII–X, Second ~40,000 on VIII–X, First ~55,000 on IX–X, and Elite ~64,000 on Tier X destroyers (plus superships where applicable).

DD damage often comes in spikes from torpedoes and opportunistic farms. A few low-damage battles in the rolling 100-game window can drop the average under the next grade — that is why a focused Destroyer run helps more than mixed-class play.

Bring battle-ready DDs for the tier band of your target mark: VIII–X for Third/Second, IX–X for First, Tier X for Elite. Tell support which hulls you prefer for Random Battles.

Yes. Use Execution speed (Expedited / Express) or Priority order in the calculator. Specific time, replays, and screenshots are optional extras.

Usually stay offline while ordered DD sessions run. Enable Playing in Specific time if you need a shared schedule — other-class battles do not advance this emblem.