We don't have synonyms for crash dives yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are crash dive, crash-dives and crash dived.
(n) :
Alternative form of crash dive. [(idiomatic, military) An emergency maneuver by a submarine in which it suddenly descends, especially to considerable depth, usually in order to escape an attack or avoid a collision.]
(v) :
Alternative form of crash dive. [(intransitive, idiomatic, often hyphenated, submarine operation) To perform a crash dive.]
(n) :
Alternative form of crash dive. [(idiomatic, military) An emergency maneuver by a submarine in which it suddenly descends, especially to considerable depth, usually in order to escape an attack or avoid a collision.]
(v) :
Alternative form of crash dive. [(intransitive, idiomatic, often hyphenated, submarine operation) To perform a crash dive.]