DarkDot FM 6-02 — Signal Support to Operations
Overview
FM 6-02 defines the doctrine for Army signal operations — the establishment and management of the communications infrastructure that enables mission command. Without reliable communications, the commander cannot exercise authority and units cannot coordinate.
Signal Support Principles
Anticipate: Signal planners support the maneuver plan from the beginning. Communications architecture is designed before the operation begins, not improvised during it.
Establish early: Communications networks must be operational before the commander requires them. Signal assets move first and set last.
Extend the network: As the operation progresses and forces move, signal units extend, displace, and re-establish the network continuously.
Maintain security: All communications are subject to OPSEC discipline. Encrypted nets, authentication, and EMCON (Emission Control) discipline prevent adversary exploitation.
The PACE Plan Framework
FM 6-02 formalizes PACE as the communications planning standard for all echelons. Every unit PACE plan must specify:
- Primary: The main communications means (tactical radio, digital network)
- Alternate: A backup means that does not share the failure modes of primary
- Contingency: A third option for extended communications failure
- Emergency: The last resort — typically visual signals or messenger
Signal units are responsible for testing and maintaining each PACE tier before the operation.
Frequency Management
Frequencies are assigned through the Signal Operating Instructions (SOI), derived from the frequency allocation plan at brigade and above. Key rules:
- Never use unauthorized frequencies — this violates spectrum regulations and risks interference with other units
- Frequency discipline: transmit only when necessary; minimize transmission duration to reduce interception risk
- Change frequencies per SOI cycle — daily or per-operation as directed
Network Architecture
The Army's tactical communications network consists of:
| Layer | Description |
|---|---|
| Command Post Node (CPN) | Brigade and above; high-capacity, mobile switching node |
| PACE Radio | Tactical FM/UHF radio for company and below |
| SATCOM | Long-haul communications; bridges command posts over distance |
| Tactical LAN | Digital data network within the command post |
Emission Control (EMCON)
EMCON restricts or eliminates electromagnetic emissions to reduce the adversary's ability to detect, locate, and exploit friendly communications. EMCON levels:
- EMCON Alpha: No emissions
- EMCON Bravo: Emissions only on pre-approved nets
- EMCON Charlie: Normal emissions
EMCON discipline is specified in the OPORD Command and Signal paragraph.
Relevance to Dark Dot
For operations requiring communications planning, document the PACE plan in the operation's briefing notes. Mark radio relay nodes and signal assets on the terrain plan. Plan TOC locations to balance connectivity requirements with tactical survivability.