G3, N3, and the blurred battlecruiser label

The older contrast between commerce-hunting battlecruisers and battle-fighting battleships is too rigid for the G3 and N3 era. Most naval work demands mobility, while the rarer fleet action still demands a ship that can survive serious gunfire. The battlecruiser's reputation after Jutland also encouraged navies to prefer the fast-battleship label. The type is defined here as a battlecruiser concept with the armour needed for that wider role.