Co-op submarine command. Drop in anytime — sign in with X so the pack knows your callsign. Stay quiet for passive tracks; active sonar ranges contacts but broadcasts your position. Battleships and U-boats dump depth charges.
·Click water to plot course — land tiles are impassable
·Right-click / Fire for Mk-14 or Seeker torpedoes
·Dive deep: blue veil = submerged · sun glints = surface
·Hydrophones always listen — Active Sonar pings range but reveals you
·Battery, Silent, Scope, Snorkel — manage energy and mast risk
·Click a ship to target, then Ambush / Stalk / Intercept — AI drives the boat
·Destroyers throw Hedgehog; U-boats fire torpedoes; go deep under the layer
·Battleships & large U-boats drop depth charges — 2–3 tiles off the hull
·U-boats are huge hunter-killers with DC patterns — bubble screens spoof them
·Dock at FOB Argus (minimap ring) to repair & restock
·Supply crates: hull, warheads, engines, ammo, CM
·Allies appear as blue-ringed subs — anyone can join mid-patrol