Heavy cruisers were built mainly for commerce protection and could operate from smaller, less capable ports than battlecruisers. Some early designs could burn coal or oil according to local supply, another advantage on distant stations. Their speed, armour, and torpedoes made them a risk to a surface raider attacking a convoy, even if their guns were unlikely to penetrate a capital ship’s armour. A raider had to approach the convoy and could not count on quickly disabling a fast, manoeuvring escort before torpedoes or reinforcements threatened it. Treaty limits later made each heavy cruiser less expendable while the 10,000-ton ceiling reduced its ability to perform the full role. Their value came from affordable presence and the risks they imposed on an attacker.
Notable Point · 5:30-9:12
Commerce protection and cruiser risk
A cruiser’s distant-station value lay in commerce protection and risk management, including against battlecruisers it could not defeat outright.