The Mk42/43M Life Preserver is the latest evolution in fast jet AEA, harnessing Survitec expertise and pedigree across major international fast jet programmes. Qualified and tested in partnership with Uk MoD, the Mk42/43M introduces a new benchmark in pilot protection. The Mk42/43M design ethos focussed on capturing existing equipment standards whilst advancing current performance parameters. the result was a stepped improvement in safety, including increased in-water survivability, improved user comfort and mobility, and lower thermal burden. Each attribute has been strongly evidenced through a rigorous qualification program that has employed a component/ system testing regime.