Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 21 — Microphone, speaker, magnetic tape and the telephone exchange  /  About year 65
21.16

Two-way radio for vehicles, boats and aircraft

sender and receiver in one box: a moving crew speaks with its base

KnowledgeYear 65Stands on 330 earlier

AWhat it needs

Needs 330 other products in all, 5 of them directly.

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Open a box to see what it needs. A dashed box is a product already drawn in full: click it to jump there. In the org chart, drag to move around.

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