Real ships, published figures
French FREMM, Horizon and La Fayette frigates, US Arleigh Burke destroyers, Korean KDX destroyers and Daegu frigates, their submarines, helicopters and patrol aircraft. Build your fleet on a points budget before each patrol.
The picture, not the truth
Every contact is a track built from radar returns, ESM bearings and sonar. Passive sonar gives you a bearing and nothing more: work out range, course and speed by target motion analysis, then decide whether to shoot.
Sound in the sea
Layers, surface ducts, shadow zones, convergence zones, bottom bounce, fronts and warm-core eddies, all from regional sound-speed profiles. Read the waterfall and the narrowband lines to tell a merchant from a snorting diesel boat.
Electronic warfare
Radar and communications jamming, burn-through, deception against missile seekers, chaff drifting on the wind, decoys. Every transmission you make can be heard, so emission control is a real decision.
Comms that can fail
Link 16, Link 11, voice nets, SATCOM and the submarine broadcast, each with its own reach, delay and capacity. Land, ducting, jamming and a crowded net all decide what reaches the flagship, and when.
Damage and its consequences
Hits land forward, amidships or aft. Fires spread between compartments, magazines can cook off, and generators can fail. Damage control teams fight it, and your lookouts can see the smoke on the enemy.