A runner relay carries a written or spoken message between settlements by handing it from one runner to the next at stations 5 to 10 km apart. Over 60 km the total time is the number of legs times the leg time plus the handovers, so about 7 hours at a pace of 10 km/h, against 12 hours for one person walking; the system works only if every runner has an agreed arrival time and an overdue rule that sends help when it is missed.
Part of Signal Systems and Communication
A runner system moves messages that are too long or complicated for a signal code, using people stationed along a route who run one leg each.
What The Parent Claims, And What To Plan With
The parent article gives a fit runner 10 to 15 km per hour on roads and 5 to 8 km per hour on trails, with stations every 5 to 10 km. A pace of 10 km/h is 6 minutes per kilometre, which many recreational runners can hold for 5 to 10 km (a figure I am recalling and have not been able to check); 15 km/h is 4 minutes per kilometre and a hard effort for most people over even 5 km, particularly with boots, a pack, darkness and rough ground. Walking at about 5 km/h is the slow fallback (the figure the corpus uses elsewhere). Plan with 8 to 10 km/h on a good road in daylight, 5 km/h at night or on a bad trail, and test the real legs.
Worked Example: Legs, Handovers And Total Time
Total time T = n x (L / v) + (n - 1) x h, where n is the number of legs, L the leg length, v the pace and h the handover time. For a distance D = 60 km, n = D / L. Example inputs: h = 10 minutes.
| Plan | n | Leg time | Handovers | Total |
|---|---|---|---|---|
| One person walks, 5 km/h | 1 | 12 h | 0 | 12 h |
| 10 km legs at 10 km/h | 6 | 6 x 60 min = 360 min | 5 x 10 = 50 min | 410 min, about 6.8 h |
| 5 km legs at 10 km/h | 12 | 12 x 30 = 360 min | 11 x 10 = 110 min | 470 min, about 7.8 h |
| 5 km legs at 12 km/h | 12 | 12 x 25 = 300 min | 110 min | 410 min, about 6.8 h |
Two lessons follow. Shorter legs let each runner go faster, but every extra station adds a handover; at the same pace, halving the leg length added an hour. And the whole relay still takes about 7 hours, which is why a signal chain (Signal Tower Chains) is used for alarms and runners for content.
What You Need
- Stations every 5 to 10 km, each with a shelter, water and at least one rested runner on call.
- A known route, walked and timed in daylight and at night.
- A message form: from, to, date and time, serial number, text, and a line for the receiver’s name and time.
- A verbal token that the runner states on arrival, from a one-use list (Authentication and Security).
- A light, a whistle and water.
Method: Running The Relay
Step 1: Write short, readable text. Block capitals, plain words, no abbreviations the next runner might misread. A message of a sentence or two is better than a page.
Step 2: Read it back at handover. The receiving runner repeats it, as the telegraph protocols do (Protocols), and the time of handover goes on the form.
Step 3: Record the departure time and the expected arrival. The station ahead knows when to expect the runner.
Step 4: Apply the overdue rule. If the runner has not arrived by 1.5 times the planned leg time (an example margin), the station ahead sends two people back along the route to look, at walking pace, not one.
Step 5: Rest the runner. A runner who has covered a leg rests and is replaced by the next on the rota; the same person does not run the return leg without rest.
Security
The parent article advises memorising short messages and destroying written ones if capture is near. Paper cannot be reliably destroyed in seconds, so write nothing that cannot be known to a captor. Keep tokens and authenticating words in the head, not on the form. The parent says runners travel alone and the watch article says never send a solo patrol; reconcile them by leg: alone only in daylight on a short, known leg with a check-in at the far end, in pairs at night or on a long or lonely leg.
Diagnosing Failures
- Runner late. Apply the overdue rule; do not wait for certainty.
- Message wrong on arrival. The handover read-back was skipped. Re-send from the last correct station.
- Runners exhausted. Legs are too long or the rota too thin. Shorten legs or add runners.
- Message read by outsiders. It was written when it should have been spoken, or was carried in the open. Reduce what is written.
Common Mistakes
- Using the 15 km/h figure for planning. It is an upper figure for a rested runner on a good road.
- No rest for the runner at the far end. A run back at once costs a sprain.
- A relay that carries alarms. Use it for detail; alarms go by signal.
Safety
Night running, heat and lone travel
Running on rough ground in the dark causes sprains and falls, and a runner alone with an injury may lie out all night. Heat stroke can follow hard running in hot weather (see Heat Stroke). Carry water, tell the station you are leaving, and use pairs at night. Do not run a leg you have not walked first.
What’s Next
- Learn next: Signal Tower Chains — the fast alternative for alarms
- Combine with: Patrol Runner Systems — runners inside the settlement