Assertion: radio wave's frequency | /r/ObjectUse | used for military communications
Facets:
value: with ships
type: OTHER
value: with submarines
type: OTHER
value: mostly
type: DEGREE
Source sentences:
text: The VLF and LF frequencies are mostly used for military communications, especially with ships and submarines.
text: VLF and ELF waves can penetrate significant distances through water and earth, and these frequencies are used for mine communication and military communication with submerged submarines.
text: Various frequencies of radio waves are used for television and FM and AM radio broadcasts, military communications, mobile phones, ham radio, wireless computer networks, and numerous other communications applications.