(at around 17 mins) A picture frame containing 10 maritime flags spells out "katie sucks" using the maritime flags of the International Code of Signals.
Archer uses his go-to alias, Randy.
Rip Riley's seaplane's tail number, 301, is a reference to the episode number.
Archer says "What? What?" after Rip says "Pirates". In Tragical History (2011), Cyril loads a computer virus into ISIS's computer system that has pirates that say What? What.