Keep average damage over the last 100 Random Battles above the grade threshold on eligible submarines. The scale is lower than cruisers or battleships, but consistency still matters.

Published targets (verify live): Third ~23,000, Second ~26,000, and First ~40,000 on submarines VIII and X; Elite ~60,000 on Tier X subs.

Yes — the same four-grade class-emblem structure (Third → Elite) and rolling 100-battle average. Submarine marks were added later, but they use that shared framework.

ASW pressure, battery management, and when you surface all affect damage per battle. Dry games still swing the average even though the absolute numbers look smaller than BB/CA thresholds.

Have battle-ready subs for VIII and X if you aim at Third–First, and Tier X hulls for Elite. Name your roster in the ticket so the run does not stall on a weak boat.

Avoid it during account execution unless support schedules downtime. Off-class battles do not count toward the submarine average and can conflict with the ordered sessions.