Run of the All Stars version of Ultimate Ship Outskirts by insectduel.
Just when you thought it was over, we have one more Ship Outskirts stage and it is huge. It features your common airship enemies and obstacles and as an inspiration to the e-Reader stage Bombarded By Bob-Ombs, a fast moving cabin area. Bosses: Boom Boom and Bowser. Music:

Salamander - Planet Ratis (Areas 1 and 2)
Salamander - Poison of Snake (Areas 3 and 4 + Boom Boom battle)
Gradius II Arcade - Fire Dragon (Bowser battle)