The Ideal Submarine 'Field Day'
Field Day according to Merriam Webster:
1. a : a day for military exercises or maneuvers. b :an outdoor meeting or social gathering .
Field Day according to Wikipedia is a noun derived from military terminology:
1. (military) A parade day.
6. (US Navy & US Marine Corp) Top-to-bottom all-hands cleaning.
To the uninitiated public, however, Field Days on navy submarines has some amusing notions:
Submarines are always silent and strange.