Use when the situation is already going wrong: navigation and what to do once you are lost, signalling and rescue including what search and rescue actually looks for and why staying put usually wins, field medical priorities such as bleeding, airway and immobilisation, heat illness and the distinction between exhaustion and heat stroke, and animal risk placed in its real proportion. Orientation, not a substitute for medical training.
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---
name: survival-navigation-signalling-and-field-medicine
description: "Use when the situation is already going wrong: navigation and what to do once you are lost, signalling and rescue including what search and rescue actually looks for and why staying put usually wins, field medical priorities such as bleeding, airway and immobilisation, heat illness and the distinction between exhaustion and heat stroke, and animal risk placed in its real proportion. Orientation, not a substitute for medical training."
---
# Survival: Navigation and Being Lost, Signalling and Rescue, Field Medical Priorities, Heat Illness, and Animals in Proportion
> **Part 3 of 6** of the *Survival Skills* reference (plugin `survival-skills`), covering §8–§12. Sibling skills: `survival-what-kills-psychology-and-priorities` (§0–§3), `survival-shelter-water-fire-and-food` (§4–§7), `survival-environments-cold-desert-tropical-water-and-urban` (§13–§17), `survival-planning-kit-practice-and-myths-that-kill` (§18–§22), `survival-reference` (§23–§28). Section numbers are shared across the set; a reference written as §N → `skill` points into that sibling skill.
>
> **Currency:** The physiology is fixed. Two areas are live. See §23 → `survival-reference` for search-and-rescue base rates, and current wilderness medicine guidance.
> **⚠️ The single most important reframe in this entire document: survival skills are
> mostly PREVENTION skills, and the dramatic ones are the least useful.** ⚠️ **The
> popular image — friction fire, foraging, trapping — describes a situation you should
> never reach, and it distracts from the things that actually determine outcomes:
> telling someone where you're going, carrying insulation, and being findable** (§9,
> §23.1 → `survival-reference`).
>
> **⚠️ SCOPE AND LIMITS, stated plainly.** ⚠️ **This is a conceptual reference, not
> training. Wilderness first aid, avalanche safety, swiftwater and technical rescue
> require hands-on instruction and cannot be learned from text.** **⚠️ Nothing here
> substitutes for professional medical care, and where a real emergency is in progress
> the answer is almost always to activate rescue rather than to improvise** (§9).
> **⚠️ Plant identification in particular cannot be done safely from written description**
> (§7 → `survival-shelter-water-fire-and-food`).
>
> **Complements a travel reference (trip planning and disruption), a
> refrigeration/food-water reference (water treatment), and an exercise physiology
> reference (thermoregulation).**
>
> **The three ideas that organize this document:**
> 1. **⚠️ PSYCHOLOGY is the primary variable** (§2 → `survival-what-kills-psychology-and-priorities`). **People die from denial, panic and
> poor decisions far more often than from lacking a skill.**
> 2. **⚠️ HYPOTHERMIA is the wilderness killer, and it happens in mild weather** (§4 → `survival-shelter-water-fire-and-food`).
> **Not starvation, not thirst, not animals.**
> 3. **⚠️ BEING FOUND beats surviving indefinitely** (§9). **Almost every survival
> situation is resolved by rescue, so everything that makes rescue faster is worth
> more than everything that extends endurance.**
---
## §8. Navigation and Being Lost
**⚠️ Prevention**: ⚠️ **carry a map and compass AND know how to use them (⚠️ a compass you
can't take a bearing with is a decoration); ⚠️ carry a GPS or phone with OFFLINE maps and
a battery pack; ⚠️ and use both, because electronics fail and paper doesn't tell you where
you are.**
**⚠️ The habits that prevent lost**: ⚠️ **look BACKWARD periodically (the return route
looks completely different); note landmarks and time at junctions; ⚠️ track your position
continuously rather than reconstructing it later; and set a TURNAROUND TIME and honour it**
(§2 → `survival-what-kills-psychology-and-priorities`'s summit fever).
**⚠️ Handrails, catching features and aiming off** — ⚠️ **the classic navigation
techniques: follow a linear feature, know what you'll hit if you overshoot, and
deliberately aim to one side of a target so you know which way to turn when you reach the
handrail.**
**⚠️ If lost**: ⚠️ **STOP (§2 → `survival-what-kills-psychology-and-priorities`). Do not keep walking. Mark your position. Reconstruct your
last known point.** ⚠️ **If you must move, prefer DOWNHILL toward drainages in most
terrain — water leads to larger water, then to trails, roads and habitation** — **⚠️ with
the important exception of canyon and slot terrain, where downhill leads to
impassable drops and flash flood risk.**
---
## §9. ⚠️ Signalling and Rescue
> **⚠️ The highest-value section for the effort involved, and the most neglected.**
> ⚠️ **Almost every survival situation ends in rescue, so anything that makes rescue
> faster is worth more than anything that extends survival.**
```
⚠️ THE SINGLE HIGHEST-VALUE ACTION IS TAKEN BEFORE YOU LEAVE:
⚠️ TELL SOMEONE WHERE YOU'RE GOING AND WHEN YOU'RE DUE BACK,
with instructions to call for help if you don't check in.
⚠️ SAR research indicates the speed at which someone is reported
missing is a dominant predictor of outcome (§23.1)
⚠️ SATELLITE MESSENGERS AND PLBs ⚠️ the single biggest technological
improvement to backcountry safety. A PLB or two-way satellite
messenger works where phones don't and transmits your position
⚠️ Newer phones with satellite SOS extend this to casual users
⚠️ PASSIVE SIGNALS (work while you rest — ⚠️ prefer these)
⚠️ Bright colours in clearings · ground-to-air symbols large and
with contrast/shadow · ⚠️ anything geometric, because nature has
few straight lines
⚠️ ACTIVE SIGNALS
⚠️ SIGNAL MIRROR — ⚠️ visible at extraordinary distances and
weighs nothing. Aim through the sighting hole
⚠️ WHISTLE — ⚠️ carries far further than shouting and costs almost
no energy. ⚠️ Three of anything is the distress convention
⚠️ FIRE and SMOKE — three fires in a triangle; green vegetation
for white smoke by day, dry fuel for flame at night
Torch/headlamp, ⚠️ ideally with a strobe mode
```
**⚠️ When you hear or see searchers**: ⚠️ **respond immediately and keep responding —
searchers frequently pass close by.** **⚠️ Do not assume they have seen you.**
**⚠️ Helicopter safety**: ⚠️ **approach only when signalled, from the front where the pilot
can see you, crouched, never from the rear (tail rotor), and secure everything loose.**
**⚠️ Do not turn off your phone to save battery** — ⚠️ **airplane mode with periodic checks
preserves battery while allowing location attempts; and even without signal, a phone may
be locatable and stores your track.**
---
## §10. ⚠️ Field Medical Priorities
> **⚠️ Conceptual only. Take a wilderness first aid course — this material genuinely
> requires hands-on training, and a course is a weekend.**
```
⚠️ THE ORDER scene safety FIRST (⚠️ do not become a second casualty) →
⚠️ catastrophic haemorrhage → airway → breathing → circulation →
disability/spine → environment (⚠️ hypothermia, §4)
⚠️ MASSIVE BLEEDING ⚠️ direct pressure, hard and sustained; wound
packing for junctional wounds; ⚠️ TOURNIQUET high and tight for
life-threatening limb bleeding — ⚠️ modern practice regards
tourniquets as clearly life-saving and the historical fear of
them as overstated. ⚠️ Note the time applied
⚠️ WILDERNESS DIFFERENCES FROM URBAN FIRST AID
⚠️ Definitive care is HOURS or DAYS away, not minutes
⚠️ You may have to move the patient, and you may have to
decide to leave them to get help
⚠️ Improvisation and prolonged care become necessary
⚠️ Evacuation decisions are themselves medical decisions
```
**⚠️ Common wilderness problems**: **blisters (⚠️ treat at the "hot spot" stage, before
they form), sprains and fractures (⚠️ splint as found, check circulation before and
after), burns, wounds (⚠️ irrigation with clean water under pressure is the single most
important wound intervention), and dehydration.**
**⚠️ Spinal precautions have been substantially reconsidered** — ⚠️ **rigid immobilization
of every possible spinal injury is no longer standard, and prolonged immobilization in the
field carries its own harms.**
**⚠️ Carry what you'll actually use and know how to use it** — ⚠️ **a large kit you can't
deploy is worse than a small one you can.**
---
## §11. Heat Illness
```
⚠️ HEAT EXHAUSTION heavy sweating, weakness, nausea, headache,
⚠️ MENTAL STATUS INTACT. Rest, shade, fluids, electrolytes
⚠️ HEAT STROKE ⚠️ ALTERED MENTAL STATUS + high core temperature.
⚠️ A MEDICAL EMERGENCY with a mortality that rises with every
minute of delay
⚠️ THE DISTINGUISHING SIGN IS MENTAL STATUS, NOT SWEATING —
⚠️ "dry skin" is NOT required; exertional heat stroke frequently
presents with the patient still sweating profusely
⚠️ TREATMENT ⚠️ COOL FIRST, TRANSPORT SECOND. Cold water immersion
is the most effective field cooling method where available;
otherwise wet the skin and maximize airflow, ice to neck,
armpits and groin
```
**⚠️ Hyponatremia is the mirror-image error and it is mistaken for dehydration**:
⚠️ **drinking large volumes of plain water while losing sodium through sweat produces
confusion, nausea and headache — symptoms that look like dehydration, and giving more
plain water makes it worse and can be fatal.** ⚠️ **Include electrolytes and food on long
exertion, and be suspicious when someone who has been drinking heavily gets worse.**
**⚠️ Wet-bulb temperature is the meaningful heat-stress metric** (see a refrigeration/
psychrometrics reference) — ⚠️ **because evaporative cooling fails as humidity rises.**
---
## §12. ⚠️ Animals, In Proportion
> **⚠️ Wildlife is far down the risk list (§1 → `survival-what-kills-psychology-and-priorities`), and the fear is disproportionate to the
> hazard almost everywhere.**
**⚠️ The realistic ordering of animal-related harm**: ⚠️ **insects and arachnids as disease
vectors far exceed everything else; then large herbivores (⚠️ which injure more people
than predators in most parks — moose, bison, deer); then dogs; then venomous snakes; then
large predators.**
**⚠️ General principles**: ⚠️ **distance and food storage prevent nearly all conflict;
never come between a mother and young; do not run from most predators; and the correct
response varies by species, so learn the local specifics rather than a general rule.**
**⚠️ Snakebite** — ⚠️ **see §23.2 → `survival-reference` for current guidance, because the folklore here is
actively harmful.**
**⚠️ Insect-borne disease** is the genuine wildlife risk in most of the world: ⚠️ **bite
avoidance, permethrin-treated clothing, repellent, and tick checks with prompt correct
removal.**
---
# PART IV — ENVIRONMENTS
