100年前潜艇走过的抽象弯路，巡洋潜艇路线趣闻

参考资料：
https://dieselfutures.tumblr.com/post/174527555908/hms-x1/amp
X.1: The Royal Navy's Mystery Submarine: Amazon.co.uk: Roger Branfill-Cook: 9781848321618: Books
His Majesty's Scary Steam Subs - War Is Boring
https://web.archive.org/web/20160328132658/http://www.public.navy.mil/subfor/underseawarfaremagazine/issues/archives/issue_49/KforKatastrophe2.html
https://en.wikipedia.org/wiki/AA-1-class_submarine
https://en.wikipedia.org/wiki/John_Philip_Holland
https://en.wikipedia.org/wiki/Turtle_(submersible)
http://rnsubs.co.uk/boats/subs/m-class.html
https://www.theguardian.com/commentisfree/2017/nov/04/k-class-submarines-disaster-navy-britain-hms-vigilant
https://en.wikipedia.org/wiki/Cruiser_submarine