Communications discipline on the Ukrainian front extends classic radio discipline principles to an EW-saturated, SIGINT-saturated and drone-saturated environment. This chapter describes defensive practices specific to the modern setting: PACE plan, frequency management, extended OPSEC. It builds on the Foundation Radio Discipline chapter and does NOT describe intercept or jamming procedures.
Extension of classic radio discipline
Base principles — brevity, accuracy, security, RSVP, standard structure — remain valid. The modern setting adds three new axes: forced redundancy (PACE), frequency agility, extended content discipline.
- Brevity: operational target < 6 seconds (tighter in active EW zone)
- Expectation of listening: continuous high-quality SIGINT — assume total intercept
- Metric DF: transmissions > 6 seconds produce a fix useful to enemy targeting
- Pattern of life: recurring hours, frequencies, callsigns are profiled without decryption
- Bilingual operators: Russian and Ukrainian offer no concealment advantage
- Content discipline: no names, no intentions, no friendly positions in clear
PACE plan — mandatory redundancy
PACE is NATO doctrine for communications redundancy. In EW environment it is not optional — it is the minimum survival framework.
| Level | Type | Operational example |
|---|---|---|
| P — Primary | Main means | Encrypted tactical radio on primary frequency |
| A — Alternate | Equivalent-capacity backup | Second frequency or second set |
| C — Contingency | Reduced capability | Clear radio on brevity codes, satellite |
| E — Emergency | Last resort | Runner, visual signals, physical rendez-vous points |
PACE is not improvised. The four levels must be set before the operation, communicated to all elements, rehearsed. When Primary falls, Alternate is already ready. Without written plan, under stress you fall back to phone — easy target.
Frequency management
- Rolling frequencies: change every 24-72 hours to reduce pattern of life
- Emergency frequencies: separate from operational, reserved for contact / MEDEVAC
- CEOI (Communications-Electronics Operating Instructions): synthetic doc distributed before op
- Frequency scanners: monitor adjacent bands to detect friendly or enemy jamming
- EW "window" frequencies: in some sectors specific bands stay relatively clean — use but assume intercept
- Civilian-radio discipline: Baofeng and PMR are very common in volunteer use — useful but transparent to SIGINT
Extended content discipline
The modern environment requires content discipline beyond the traditional. Even brevity codes can be correlated and profiled.
- No teammate or commander proper names
- No unit, rank, friendly position numerics in clear
- No operational intent ("we move at 0400")
- No friendly artillery hit confirmation (BDA in clear = SIGINT correlates to source)
- No celebration of successful action on radio (high SIGINT value)
- No identifying emotional expression ("Marco is down" IDs unit and loss)
- MGRS in standard format, no recognisable landmark reference ("near the broken church")
Smartphone and messaging
Smartphone is a useful tool (map, photo, military apps such as Kropyva, Delta in UA) but also a SIGINT device against its carrier. Discipline differs by role and phase.
- Airplane mode in forward zone, even during offline map use
- Power off + Faraday bag during stalking or static ambush
- Encrypted apps (Signal, Telegram) protect content, NOT device identification or cellular geolocation
- Photo / video: EXIF metadata stripped before any sharing
- Ukrainian military apps (Kropyva, Delta, GIS Arta): only on dedicated, disciplined devices
- Russian Leer-3 system (with Orlan-10 drone): intercepts tactical GSM, can send phishing/propaganda SMS
Publicly documented cases of positions compromised by photos posted on Instagram, Telegram, TikTok. Even "just for family" on private accounts: the leak is structural, not exceptional.
Net behaviour under EW attack
- Recognise the symptom: noise floor, reception loss, fragmented voice
- Brief net callout ("EW ACTIVE") with no further transmission
- Shift to Alternate frequency per PACE — do not improvise
- Maintain silence unless urgent — enemy awaits reaction traffic
- Verify whether EW is friendly or enemy (pre-op brief must cover)
- Report the event on return for analysis — EW pattern useful to command
Pre-mission communications brief
- Primary, alternate, emergency frequencies with shift times
- Assigned callsigns, roles, radio check sequence
- Written PACE plan shared
- Brevity codes / CEOI distributed
- MEDEVAC procedure: 9-line prepared, dedicated MEDEVAC frequencies
- Compromise procedures: what to do if radio lost, captured, broken
- Confirm EW awareness expected in sector
Common mistakes
- No PACE plan — when Primary falls, improvisation
- Transmissions > 10 seconds justified by "I'm on crypto"
- Smartphone on in forward position "just to check map"
- Group selfie at end of operation (structural leak of position and identity)
- Friendly artillery hit confirmation in clear (SIGINT correlates to firing source)
- Fixed frequencies never changed — full pattern of life for the enemy
- New volunteers using civilian prowords ("COPY THAT", "10-4") without training
Lessons learned Ukraine
The 2022-2026 front generated the most extensive practical experience of radio discipline in an EW-saturated environment in modern history. Operational synthesis shared by longest-surviving brigades: 'You don't win with the best radio, you win with the best discipline.' Documented cases of command posts lost to: smartphones not turned off, long unencrypted transmissions, Telegram selfies, undisciplined BDA confirmations. Ukrainian brigades that introduced rigorous PACE, documented CEOI, mandatory Faraday bags in forward phase, have significantly reduced SIGINT-driven losses. The radio in 2026 is a double-edged weapon: used well it saves, used badly it kills more than direct artillery.