You really don't understand the concept of a longevity transfer. Longevity and seniority have nothing to do with each other. The idea of a national longevity list is that if you were to say get furloughed from one carrier after 5 years, you would keep your longevity for pay purposes only. You would still be at the bottom of the seniority list at your new carrier but you would be at year 5 on the pay scale. That way you don't have to endure first year FO pay again or take as big of a pay cut.

People really have a hard time understanding that seniority and longevity are two totally separate things.