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Definition of Term

(English) An acronym derived from the expression 'sound navigation' and ranging; the method or the equipment for determining by underwater sound techniques the presence, location, or nature of objects in the sea; a system for determining distance of an underwater object by measuring the interval of time between transmission of an underwater sonic or ultrasonic signal and return of its echo. (See also: acoustics, echo ranging, sound velocity)
(French) Un acronyme dérivé de l'expression 'sound navigation and ranging' ; la méthode ou le matériel pour déterminer par des techniques de son sous-marines la présence, localisation, ou nature des objets dans la mer ; un système pour déterminer la distance d'un objet sous-marin en mesurant l'intervalle de temps entre la transmission d'un signal sonique ou ultrasonique sous-marin et le retour de son écho. (See also: acoustics, echo ranging, sound velocity)
(Portuguese) Acrónimo derivado da expressão "navegação pelo som"; método ou equipamento para determinar a presença, a localização e a natureza de objectos no mar. (See also: acoustics, echo ranging, sound velocity)

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