Lesson Overview
The previous two lessons guarded the water and the food. This one goes to the source of the disease that fouls both: human waste. Nearly all the field illness that matters begins there, and from waste it travels by water and by food back into people's mouths. Break the chain at the latrine and you cut off the routes those lessons worked to close, at their surest point.
This is also where the Army's character shows on the ground. A small, lightly armed humanitarian home-defence force earns its standing not by firepower but by the order it keeps and the care it takes of the people around it. Sanitation is prevention: the patient daily work of stopping disease before anyone needs treating. So the measures below are taught as field engineering, as discipline, and as a leader's duty, the things a member does unbidden and a commander must see done.
By the end you will be able to explain why human waste is the central sanitation problem, site and use a field latrine correctly, keep it covered, clean, and used by all, dispose of refuse and greywater so they do not breed disease, and describe how a whole site is kept clean under a field-sanitation responsibility.
This is the knowledge layer. Siting, building, maintaining, and closing latrines and waste-disposal devices is reinforced and certified in person under qualified supervision; the care of those who fall ill belongs to the Combat First Aid course and to qualified medical staff.
Key Terms
- Sanitation: the disposal of waste and the keeping of a clean, healthy site, above all the safe disposal of human waste.
- Human waste: faeces and urine; the chief source of the disease that travels to water and food, and the first thing a camp must control.
- The field latrine: the place built for the disposal of human waste, sited, used, and maintained to keep that waste from reaching people, water, or food.
- Cat-hole: a small hole dug for a single use and covered straight after, used on the march or at short halts where no latrine has been built.
- Deep-trench latrine: a longer, deeper unit latrine, dug and screened for a camp that will stand for some days, with seats over the trench and waste covered after each use.
- Soakage pit: a pit filled with stone or rubble that lets liquid waste, greywater or urine, drain into the ground instead of pooling on the surface.
- Greywater: the wash-water and waste water from washing, bathing, and the kitchen, disposed of by soakage away from the supply.
- The field-sanitation responsibility: the duty, held within a unit, of overseeing the siting, building, use, and upkeep of its latrines and waste disposal, so that one person is answerable for the cleanliness of the whole site.
Why human waste is the heart of it
Nearly all the field illness that matters begins in human waste. The diarrhoeal diseases, the dysenteries, the foul-water fevers all leave the body in the waste of a sick person, then look for a way back into someone else's mouth. They find it three ways: through water, when waste seeps or washes into the supply; through food, carried by flies that walk from the waste to the plate or by hands not washed after the latrine; and through the fouled ground itself, where open waste breeds flies and contaminates everything near it. Control the waste, and you cut every one of these at the source.
It helps to see the routes together, because safe disposal is the one act that closes them all at once:
THE FAECES-TO-MOUTH CHAIN, AND WHERE THE LATRINE CUTS IT
[ human waste ]
|
+------+------+----------------+
| | |
seepage flies hands
/ run-off | (not washed)
| | |
[ WATER ] --> [ FOOD ] <---------+
| |
+------+------+
|
people's mouths --> disease --> more waste (the loop closes)
Control the waste at the latrine, and every arrow above
loses its source. This is why sanitation is the heart of it.
Every route begins at the same box, so a force that contains and covers its waste does not block one arrow but starves the whole diagram. This is the link Lesson 02 attacked from the water end and Lesson 07 attacks from the fly end; here we attack it at the source. That is why sanitation is the first work of any camp. A force that disposes of its waste properly has shut the door through which most of its illness would come, and no care over water or food can make up for waste left to foul the ground. The measures are plain, but they are not optional, and on a relief site the cost of neglecting them falls hardest on the people the Army came to help.
The field latrine: siting, forms, use, and upkeep
Proper disposal in a camp means a latrine, and it must be sited, built, used, and maintained correctly to do its work. Each is a separate skill and a separate point of failure.
Siting: distance and the lie of the land
Siting comes first: a latrine in the wrong place does harm, and no care in the building can undo a bad position. Two ideas govern it, distance and the fall of the land.
The firmest rule is distance from water, held together with downhill ground. A latrine is sited well away from any water source and downhill of it, so nothing can drain or seep towards the supply. As a working guide, set it a good distance from water, of the order of many tens of metres, and always on the lower ground, never above the source or the camp. The exact figure depends on the soil and how the water lies, and is reinforced on the certified course; the principle to fix now is that a latrine belongs well off and downhill of the water, never anywhere it could feed back into what people drink. Where it must be near a watercourse at all, it goes well downstream of every drawing point, for the same reason Lesson 02 gave for drawing water upstream of all fouling: put the dirt below the clean, never above.
The latrine is also kept well clear of the kitchen and anywhere food is prepared or eaten, both to keep flies off the plate and to keep the smell away. As a working guide, the latrine sits furthest of all the waste devices from the cookhouse, a good hundred metres or more where the ground allows; the soakage pits and rubbish go closer but still well clear, of the order of thirty metres or more from where the unit eats. The latrine is placed downwind of the living and sleeping areas, far enough to keep flies and smell from the camp, yet near enough and plain enough to be reached readily in the dark. A latrine too far or too foul will not be used, and an unused latrine is no protection at all.
Hold the whole rule in one picture: clean things high and upwind, dirty things low and downwind, and apart.
SITING: THE CLEAN HIGH AND UPWIND, THE DIRTY LOW AND DOWNWIND
higher ground ~~ wind ~~>
+------------------+
| WATER POINT | drawn here, above all fouling
+------------------+
| ground falls away
+------------------+
| KITCHEN / MESS | hand-washing beside it
+------------------+
| soakage / rubbish: ~30 m+ off, clear of mess
+------------------+ o o (greywater soakage)
| LIVING / SLEEPING|
+------------------+
| downwind, downhill, well clear
v
+------------------+
| LATRINE | ~100 m+ from the mess, MANY TENS OF
| (hand-washing | METRES from water and BELOW it, downwind
| at the exit) | of the living area
+------------------+
Not to scale. The rule is the order, not the metre: water highest
and cleanest; latrine lowest, furthest, and downwind.
The line to carry away: a latrine is never placed where it can reach the supply. Distance and downhill make that true, and they are decided once, when the site is chosen, and cannot be repaired afterwards.
Forms: the right latrine for the length of stay
The form varies with how long the camp will stand and the ground it stands on, but the principle never changes: contain the waste in one controlled place, and keep it covered. The forms grow more substantial as the stay lengthens.
The cat-hole is the individual latrine of the march and the short halt, used where none has been built. It is a small hole, dug a good distance off any water or track for a single use and covered with earth at once, the spoil mounded back so nothing is left in the open. Its whole virtue is being covered immediately, in the same minute it is used.
The deep-trench latrine is the unit latrine for a camp that will hold some days. A trench is dug, deeper and longer than a cat-hole, screened for privacy, with seats set over it and a cover that keeps the flies out; the waste is covered with earth after each use, and the trench is closed and mounded over when it has filled to within about a foot of the surface. Where the camp will stay, one shared, controlled latrine serves the unit far better than scattered holes.
For liquid waste, the soakage pit and the urinal carry off what would otherwise flood the latrine. A soakage pit is filled with stone or rubble so liquid drains down into the ground instead of standing on the surface; a urinal leads urine into such a pit, keeping the latrine seats clean and dry and sparing them the liquid that would otherwise breed flies and waterlog the ground.
Set the three together and the choice is governed by time and ground:
FIELD LATRINE TYPES: PICK BY LENGTH OF STAY AND BY GROUND
CAT-HOLE on the march / short halt; one use; cover AT ONCE
ground __/\__ a small hole, dug, used, filled and mounded
() straight after; leave the ground as found
DEEP-TRENCH a camp standing some days; shared unit latrine
___[seat]___ trench dug deeper and longer; screened; fly cover;
||||| earth over the waste after EACH use; close when
===trench=== filled to ~1 ft of the surface and mound over
SOAKAGE PIT / for LIQUID waste (greywater, urinal run-off)
URINAL a stone-filled pit that drains down, not across;
o o o o keeps liquid from pooling and breeding pests;
:rubble: sited well off and below the water, like the latrine
In every form: CONTAIN the waste in one place, and COVER it.
Hard or waterlogged ground may rule out a deep trench; then a
covered, lined or burn-out type is used instead, but the two
ideas never change.
Where the ground is too hard to dig, or the water table too high and the soil too wet for a deep trench, the unit turns to a lined, baled, or burn-out latrine that contains the waste above ground and is emptied or burned out, rather than digging into water it would only contaminate. The form changes to suit the ground; contain and cover do not.
Use and maintenance: where a good latrine is kept good
A latrine is built once but kept many times, and the keeping decides whether it protects the camp or poisons it. Three disciplines hold it.
First, it is kept covered against flies at all times. Flies moving between waste and food are among the chief carriers of the faeces-to-mouth diseases, and an uncovered latrine breeds the very pests Lesson 07 fights. The cover stays shut and the waste is earthed over after each use in the trench types. Where flies persist despite a clean, covered latrine, the structure, not the contents, may be treated against them, but cleanliness and covering come first and do most.
Second, it is kept clean, with a hand-washing place beside it that is used without fail. Seats and surfaces are cleaned regularly, paper kept dry and covered, the device tended on the daily routine. A hand-washing point at the exit is not an extra but part of the latrine, collocated with it as at the cookhouse; without it, the latrine simply moves filth from the ground onto the hands, and from the hands to the food and water. A filthy latrine, or one with no water to wash at, gets avoided, and an avoided latrine drives people to foul the ground. Cleanliness keeps it used as much as it keeps it safe.
Third, it is used by everyone, without exception. A latrine some use and others do not is no protection, because the ground fouled by the few endangers the many who share the water, the food, and the camp. Marking it plainly, lighting the way, and keeping it decent are all part of making sure it is used, by night as by day, by the tired as by the fresh.
When a trench has filled to within about a foot of the surface, or the camp moves on, the latrine is closed properly, not abandoned open. The drill is set out below.
The rule against fouling the ground
Beneath all this lies one absolute rule, worth stating on its own: no one ever fouls the ground. No member relieves themselves near water, near the camp, or carelessly anywhere; waste goes in the latrine, or, where none is built, in a cat-hole dug and covered at once. This rule protects everything else, because a single person fouling the ground near the water or the camp can poison a whole site alone, no matter how well the latrines are kept. One fouled bank above the water point, one careless act in the dark near the shelters, and the diagram at the head of this lesson is set running from a source no latrine could have caught.
Every member holds it as plain discipline, for their own sake and for everyone who shares their water, food, and ground. There are no exceptions for haste or darkness: the member too tired or too rushed to use the latrine or dig a cat-hole is the one who opens the chain for the whole camp. This is where the leader's duty bites. It is not enough to dig good latrines if some do not use them, so the discipline is taught, the latrines are made usable and findable in the dark, and the rule is enforced as a point of order. On a crowded relief site, where the people are already weakened, the rule is harder to hold and matters most.
Refuse, rubbish, and greywater
Human waste is the gravest problem but not the only one, and a clean site controls all its waste, because anything left to rot or pile up feeds the pests that carry disease. The principle that ran through the latrine runs here too: contain the dirty, lead it away from the clean, never let it draw flies and rats or drain back towards the supply.
Refuse and rubbish, the food scraps and dry waste of a camp's daily life, are collected and disposed of rather than left lying. Wet refuse that draws flies and rats is dealt with promptly; dry rubbish is gathered and got rid of. As the situation and ground allow, refuse is burned, buried, or carried out: a short halt may bury and cover it daily; a longer stay may burn it, with the ashes then buried; where local rule or sense requires, it is bagged and carried out to a proper disposal point. Buried refuse goes well away from the kitchen and the water, of the order of thirty metres or more off and below the supply, like the soakage pit; burned rubbish is burned clear of the camp and downwind. This is the same waste discipline Lesson 07 names as the first defence against pests, seen from the sanitation side: deny the flies and rodents the food and shelter that careless rubbish provides, and most of the pest problem never arises. A humanitarian army leaves no lasting trace: waste collected, disposed of cleanly, the ground left as found. That is both good sanitation and good conduct on another's land.
Greywater, the wash-water and waste water from washing, bathing, and the kitchen, is not poured out anywhere either. Standing dirty water breeds pests within days and can seep back into the supply, so greywater is disposed of by soakage through a pit or trench, sited well away from the drinking-water point so it cannot drain back, and serving the wash-line, the shower, and the cookhouse. A simple soakage leads the dirty water to a stone-filled pit, often through a grease trap that catches the kitchen's grease and scraps before they clog the soil, and it drains down rather than pooling on top.
A GREYWATER SOAKAGE PIT (drains DOWN, not across)
wash / kitchen water
|
[ grease trap ] catches grease and scraps so the pit
| does not clog and overflow
v
ground ====+====================
| : : : : : : : | <- pit filled with stone / rubble
| : stone / : | so water soaks DOWN into the
| : rubble : | ground instead of standing
| : : : : : : : |
+---------------+
Sited well OFF and BELOW the water point, like the latrine.
Two pits used on alternate days let each dry out and last.
The grease trap matters because without it the pit clogs, the water backs up and pools, and the camp has made the very standing water that breeds the mosquitoes and flies of Lesson 07. Where two pits are dug and used on alternate days, each is given time to drain and dry, and the pair lasts far longer than one worked without rest.
Keeping the whole site clean
Set all of this together and you have a whole site kept clean and disease-free, the real aim of sanitation: latrines sited and kept right, waste and rubbish disposed of, greywater led away, the kitchen clean and clear of the latrines, the water point protected and uphill, hand-washing where it is needed, the ground never fouled. Each measure closes one route of disease, and together they keep the chain broken across the whole camp. Cleanliness here is not tidiness for its own sake; it is the daily denial of every route in the diagram at once.
This is daily work, not a thing done once at the start. A camp is kept clean by routine: latrines covered and tended each day, rubbish collected each day, greywater pits rested and rotated, hand-washing points kept supplied, the ground policed for anything dropped or left, so a fault is found and put right before it breeds anything. Police of the area, done daily and by all, is itself a sanitation measure: the rubbish cleared and the standing water tipped out today is the fly and the mosquito that never hatched tomorrow.
Because so much depends on it, the cleanliness of a site is given to a clear field-sanitation responsibility within the unit: a named member charged with the siting and upkeep of the latrines, the disposal of waste, and the cleanliness of the whole place, so the health of all has someone watching over it rather than being left to chance. This is the command duty named in the first lesson, made concrete: a named member answerable, a daily routine everyone keeps, and a leader who sees it kept. It matters most for the Army's humanitarian work, because a crowded relief site with poor sanitation can poison itself and do more harm than the disaster that filled it, while one kept clean shelters the stricken without adding disease to their troubles. There the work serves many people at once, to the basic level the relief standards set, under the direction of those who lead the relief, and the care it carries, the screening of the latrine for privacy, the access made possible for the old and the sick, is owed to the people by their need. That work is taught further in Caring for Those in Need and in the Aid to the Civil Power course, where the Army learns to support and not supplant the civil and humanitarian authorities whose task the relief properly is. The discipline it depends on, the controlled disposal of waste, is taught here.
Closing a latrine or a site
A camp does not last for ever, and how it is left is part of the sanitation. When a latrine or waste pit has filled, or the camp moves on, it is closed properly so it harms no one afterwards. The drill is plain and done in order. The device is treated against flies a last time. It is then filled in, the earth packed down in successive layers rather than tipped in loose, and built up into a mound that stands a little above the surrounding ground, so that as the fill settles it does not sink into a hollow that collects water. Where flies are a problem, the closed mound is treated once more. And, except where a tactical situation forbids leaving any mark, the closed latrine or pit is marked plainly with a sign giving what it is and the date it was closed, so no one digs into it or draws water near it later.
CLOSING A LATRINE OR WASTE PIT (fill, mound, mark, leave as found)
1. treat against flies one last time
2. fill in, EARTH PACKED IN LAYERS, not tipped loose
3. MOUND it above ground level so settling leaves no hollow:
___mounded earth___
/ \
=====/ \===== former ground level
| packed layers fill |
| the pit / |
| trench |
+---------------------+
4. treat the mound again if flies persist
5. MARK it: a sign, "closed latrine / pit", with the date
(omit the marker only where a tactical situation forbids it)
The aim: nothing left exposed, the ground safe and as it was found.
Closing a site this way is the last act of the same discipline that sited and kept the latrine. For a humanitarian force it is also conduct: the Army that came to help leaves the ground clean and safe, with no trace of disease where the camp once stood.
In Practice: Two Relief Sites Above the Town
When a landslide cuts off the hill villages and people gather at two relief sites to wait out the danger, the difference between the sites is written in their sanitation. At the first, no one is made answerable. A few latrines are dug too close to the stream that feeds the camp and on the same level, so what seeps from them runs towards the water; they are left uncovered, the flies move freely between them and the cooking place nearby, the rubbish piles up, the wash-water is tipped out where it pools, and in the dark and the haste people foul the ground near their shelters because the latrines are far off, foul, and badly marked. Within days the stream is suspect, the flies are everywhere, the children are falling ill, and the relief site is harming the people it gathered to protect.
At the second site, a member holds the field-sanitation responsibility from the start, and the difference shows in every decision. The water point is set high and the latrines low, dug well below and many tens of metres away from the water and downwind of the shelters, on level ground that never drains back towards the stream. The latrines are deep-trench, screened, kept covered and earthed over after use, with a hand-washing point at the exit; a cat-hole drill is taught for anyone caught short away from them, so the ground is never fouled. The kitchen is set well clear, a hundred metres and more from the latrines, with its own hand-washing point. Rubbish is collected daily and burned or buried well off and below the water; greywater is led through a grease trap to a stone-filled soakage pit, with a second pit rested on alternate days, so nothing pools to breed flies. A daily routine polices the site, and the rule against fouling the ground is held by all. Screening and access are arranged with the old and the sick in mind, the care given by their need, under the direction of the civil authorities and relief workers who lead the response, as the Aid to the Civil Power course requires. No outbreak comes; and when the people go home, the latrines and pits are closed in order, filled, mounded, and marked, and the ground is left as it was found. The landslide was the same for both. At the second site the waste was controlled, the chain of disease was cut at its source, and the relief did what it was meant to do.
Check Your Understanding
- Why does the lesson call human waste the central problem of field sanitation, and how does disease travel from it to people through water, food, and the fouled ground?
- How should a field latrine be sited in relation to water, the kitchen, and the living areas, including the rule about distance and downhill ground, and what does it mean to keep it covered, clean, and used by everyone without exception? When would you choose a cat-hole, a deep-trench latrine, and a soakage pit?
- Explain the rule against fouling the ground and why a single person breaking it can endanger a whole camp. How are refuse, rubbish, and greywater disposed of, how is a latrine or site closed when the camp moves on, and what is the field-sanitation responsibility for?
Reflection (write a short paragraph): This lesson teaches that the whole chain of field disease runs out of human waste, and that one person fouling the ground near the water or the camp can poison a whole site however well the latrines are kept. Think of a relief or field task on difficult or crowded ground. Which sanitation measure would be hardest to hold to when tired, rushed, or in the dark, the siting and distance, the covering and hand-washing, the disposal of rubbish and greywater, or the plain rule against fouling the ground? How might letting it slip open the chain of disease at its very source, for everyone on the site, including the vulnerable people the Army came to help?
Summary
- Human waste is the central sanitation problem because it is the chief source of the disease that travels by water, by food, and by the fouled ground back into people's mouths; controlling it cuts the chain at its source, closing every route at once, and it is the first work of any camp.
- A field latrine is sited well away from any water source and downhill of it, of the order of many tens of metres, kept well clear of the kitchen (a hundred metres or more where the ground allows) and downwind of the living areas; its forms range from a covered cat-hole on the march, through a deep-trench latrine for a camp standing some days, to a soakage pit or urinal for liquid, but all rest on containing the waste and keeping it covered.
- A latrine is kept covered against flies, kept clean, provided with hand-washing at its exit, used by everyone without exception, and closed properly when filled or left: filled in, mounded above ground, and marked with the date. Beneath it lies the absolute rule that no one ever fouls the ground.
- Refuse and rubbish are collected and disposed of by burning, burying, or carrying out so nothing feeds the pests, kept well off and below the water, leaving no lasting trace; greywater is led through a grease trap to a soakage pit well away from the supply, made to drain down and never to pool or drain back.
- A whole site is kept clean and disease-free by all these measures together, on a daily routine of covering, collecting, and policing, under a clear field-sanitation responsibility that oversees the latrines, the waste, and the cleanliness of the place; this matters most at a crowded relief site, where the care is owed by need and a site below the basic standard can otherwise poison itself and harm the very people it shelters.
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