Designing merchant ships for modern mobilization

Before both world wars, governments subsidized merchant ships that incorporated hardpoints and other provisions for conversion into armed merchant cruisers, and some Japanese liners could later become escort carriers. Repeating that policy is harder when ships may be built, owned, operated, and flagged in different countries, while national merchant fleets are much smaller than in 1982. Drones and remotely controlled weapons also give small explosive payloads greater reach, increasing the danger to civilian shipping in contested waters. Electronic countermeasures, close-in weapon systems, and containerized defenses are possible modern preparations. A container cannot deliver its best performance in complete isolation: it may need power, structural support, positioning data, and navigational information from the host ship. Flag requirements are easy to evade by changing registration or ownership arrangements, so financial incentives may work better than mandates. The proposal is preparation rather than prediction, intended to make an emergency conversion less improvised if a major maritime crisis occurs.