Lesson previewHow Searchers Find You1 section shown
Preview lesson
How Searchers Find You
What you will learn
Explain how position, time, target description, changing conditions and detectable signals form a search picture without pretending to calculate or direct the search.
Searchers do not look for an idea called a casualty. They look for a described vessel, raft, person, light, radio or beacon whose likely position changes with time and conditions. Survivors help by preserving reliable facts, marking estimates and unknowns, remaining detectable and updating material changes.
A last confirmed position is a dated starting point, not a permanent current position. Search coordinators combine it with elapsed time, reported movement, wind, sea, current, alert data, sightings and the type of target. The survivor's job is to report the best evidence available and its age, not to invent a precise drift solution.
Target description changes what can be detected. A vessel, liferaft, person in the water, light, smoke, reflective return and radio transmission have different size, height, duration and receiver paths. The 2026 Cranston Inquiry showed why the search object matters: searching for small boats is not equivalent to searching for people in the water.
The search picture remains open until the right incident and every person are reconciled. One aircraft overhead, one located raft or one recovered group can be important evidence without proving that the casualty has been identified or that everybody is safe.
Search-to-contact decision board
Rehearse what is known, what comes next and what is still unproved
Select an observed state. Each case keeps the search picture, lookout, signalling, acknowledgement, coordination and handover as separate tasks. Every state is complete in text and does not depend on colour.
- 1Search picture
- 2Lookout
- 3Signal
- 4Confirm
- 5Coordinate
- 6Handover
A sighting, transmission or acknowledgement changes the evidence; it does not finish the rescue. Keep people, position, target description, receiver response and transfer state explicit.
Known now
A distress route may be carrying identity or position evidence, but the survivors do not yet have two-way confirmation of what was received, by whom or when a rescue unit may reach them.
Next safe task
Keep the approved beacon deployment and a planned listening watch, protect usable radios and update position, people, condition, drift evidence and visible target state whenever communication becomes possible.
Do not infer
An active light or transmitted alert is not proof that the complete message arrived, that the position is current, or that a recovery-capable unit is already nearby.
Record and hand over
Record alert method and time, beacon identity, position source and age, voice attempts, people, injuries, weather, target description and every changed or unknown fact.
Choose an observed state and separate what changed from what remains unconfirmed.
Worked example
A raft reports a GNSS position copied 25 minutes ago. Wind and sea have increased, the vessel sank out of sight and no voice contact has followed the beacon alert.
- 1Preserve the datum — Record the exact position source, time and the fact that it is now 25 minutes old.
- 2Report change — Add raft description, people, separation from the vessel, visible drift evidence, wind and sea observations, beacon state and voice attempts.
- 3Mark uncertainty — Say that current position and receiver acknowledgement are unknown rather than copying the old fix as current.
- 4Stay updateable — Keep lookout, target visibility and the planned listening watch while preserving battery and following rescue-authority directions.
Sense check: The handover is useful when another person can distinguish fact, age, change, estimate and unknown without asking what the number really represents.
| Search-picture field | Useful evidence | Boundary |
|---|---|---|
| Position and time | Source, coordinates or description, time and age | Last confirmed is not automatically current |
| Search object | Vessel, raft, person, light, voice or electronic report | One description does not fit every target |
| Change since report | Movement, separation, weather, visibility and equipment state | Mark estimates and unknowns |
| Detection evidence | Acknowledgement, changed search behaviour or two-way contact | Transmission alone is not receipt |
Keep an evidence-led incident record
Aboard, keep one concise incident record with position source and time, people, target description, conditions, equipment state, communication and material changes.
1. Read back
Read it back before transmission so an old fact is not promoted into current certainty.
Common mistake or limitation
- Reporting a last known position without its source or time.
- Treating an aircraft, empty raft or different located group as proof that the whole incident is resolved.
- Inventing drift precision instead of reporting observations and uncertainty.
Recap
- Position needs source, time and age; target needs a usable description.
- Report changes, estimates, contradictions and unknowns explicitly.
- A sighting or alert changes the search picture but does not finish the rescue.
Optional quick check
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