Sea Dragon - The Saturn V's big brother?

"For All Mankind" uses a rocket known as "Sea Dragon" to carry modules and supplies to the moon. Where did the idea of Sea Dragon come from, and how would it have worked? Sea Dragon Concept Volume 1 (Summaryy) https://web.archive.org/web/200512260... Sea Dragon Concept Volume 3 (Preliminary Program Plan) https://web.archive.org/web/200512261... @Eager_Space on Twitter Triabolical_ on Reddit   / eagernetwork     / eager-space-103843052204122