The difference between a frigate and a destroyer is a tricky subject. Definitions have changed wildly over time and now differ depending on where you are in the world. Sometimes the distinction is based on size, sometimes on capability, and sometimes derived from a political requirement.
UK systems and engineering group Systems Engineering & Assessment Ltd (SEA), part of the Cohort Group, has secured a GBP34 million (USD37.5 million) contract with the UK Ministry of Defence (MoD) covering the technical refresh and through-li.