Wiktionary
submarining
Tending to strike unexpectedly, in the fashion of one who submarine#Verbs n. The design, construction and use of submarines v
(present participle of submarine English)
Usage examples of "submarining".
He had spent fifteen years learning his craft, watching a generation of commanders as a junior officer, listening carefully at the frequent round-table discussions which made submarining a very human profession, its lessons passed on by verbal tradition.
He wondered how much of this was an implicit reaction to the enforced confinement of submarining, something just to make sure that there really was a world up there, to make sure the instruments were correct.