Turn missions into measurable ship requirements

The worked British example derives an 8,000-nautical-mile range requirement from the transit to the Falklands. Supply ships would need to be waiting there or catch up with the force to support subsequent operations. The example then specifies an anti-submarine warfare frigate whose picket duty requires a substantial surface-to-air missile stock. A limited escort fleet also makes some land-attack capacity desirable. Guns, possible torpedoes, and facilities for future uncrewed off-board systems would preserve flexibility beyond the primary ASW role.