Submarine signals
id:
submarine-signals-312-12633881
title:
Submarine signals
text:
Submarine signals had a specific, even proprietary, meaning in the early 20th century. It applied to a navigation aid system developed, patented and produced by the Submarine Signal Company of Boston. The company produced submarine acoustic signals, first bells and receivers then transducers, as aids to navigation. The signals were fixed, associated with lights and other fixed aids, or installed aboard ships enabling warning of fixed hazards or signaling between ships. ATLAS-Werke, at the time N
brand slug:
wiki
category slug:
encyclopedia
description:
Marine hazard signaling system
original url:
https://en.wikipedia.org/wiki/Submarine_signals
date created:
date modified:
2023-11-30T18:44:07Z
main entity:
{"identifier":"Q96406646","url":"https://www.wikidata.org/entity/Q96406646"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/e/e4/Types_of_Submarine_Signals.png","width":1200,"height":575}
fields total:
13
integrity:
15