TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
CRAZY IVAN [1 record]
Record 1 - internal organization data 2017-10-27
Record 1, English
Record 1, Subject field(s)
- Submarines (Naval Forces)
- Sonar and Underwater Detection (Military)
Record 1, Main entry term, English
- crazy Ivan
1, record 1, English, crazy%20Ivan
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- crazy Ivan manoeuvre 1, record 1, English, crazy%20Ivan%20manoeuvre
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Crazy Ivan is a U.S. Navy term for a Soviet submarine manoeuvre, characterized by any number of sudden and sharp turns, used by submarine crews to "look behind" them. Because of the acoustic distortions and noise caused by propeller blades, it is nearly possible for conventional sonars to detect objects directly behind a submarine. Thus, with sudden turns, the area where the sonar is not effective shifts relative to the current heading of the submarine, causing previous gaps in sonar coverage to be revealed while masking known areas. 1, record 1, English, - crazy%20Ivan
Record number: 1, Textual support number: 1 OBS
The "crazy" part of the name comes from the fact that these manoeuvre were very sudden and "Ivan" was a common nickname used to refer to the Russians. A standard tactic of pursuing submarines would be to closely follow the Soviet submarine hidden right in the sonar gap, causing the U.S. submarine to go undetected. 1, record 1, English, - crazy%20Ivan
Record 1, Key term(s)
- crasy Ivan
- crasy Ivan manoeuvre
- crazy Ivan maneuver
- crasy Ivan maneuver
Record 1, French
Record 1, Domaine(s)
- Sous-marins (Forces navales)
- Sonar et détection sous-marine (Militaire)
Record 1, Main entry term, French
- Ivan le fou
1, record 1, French, Ivan%20le%20fou
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- manœuvre Ivan le fou 1, record 1, French, man%26oelig%3Buvre%20Ivan%20le%20fou
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Manœuvre d'un sous-marin qui consiste à effectuer brusquement des virements de bord successifs pour compenser l'incapacité du sonar de détecter les objets situés immédiatement derrière lui, incapacité causée par la distorsion acoustique produite par les hélices. 1, record 1, French, - Ivan%20le%20fou
Record 1, Spanish
Record 1, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada
Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified: