surface-to-underwater

[sur-fis-too-uhn-der-waw-ter, -wot-er]

adjective

(of a missile, message, etc.) traveling from the surface of the earth to a target underwater.

adverb

from the surface of the earth to a target underwater.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019