Search Techniques
Type 1 - Hasty Search
This is a quick and efficient search by small teams that travel quickly
to the likely spots and by the route of least resistance. A hasty
search is generally the first tactic used in the early hours and days
of a search. The hope is the subject is still alive and responsive.
Most search missions end within the first day or two and never get past
the hasty search mode. Resources commonly used for hasty search include
ESAR, Search Dogs, 4x4 units and Helicopters. Type 2
This is a more organized yet rapid search of a large area. Small teams
of three persons are assigned an area. One-person guides on a physical
feature such as a trail, creek, road or ridge top or are assigned a
compass bearing to follow. The other two-team members guide off that
person and search an area to either side, roaming through the brush
following the path of least resistance, checking likely spots. Spacing
may be as much as 100 feet between searchers. Density of the brush
dictates how far apart searchers may be and the distance will fluctuate
depending on the visibility. This is a very efficient search tactic,
used while the subject is still believed to be responsive and will
answer to voice checks. Common resources used for Type II search is
ESAR. Type 3
This is a thorough search method but not very efficient. It requires a
large number of people to cover a relatively small area with a high
probability of detection. It is used in the later stages of a search
when the chance the subject is down and not responsive has increased.
Common resources used for Type III search is ESAR. Type 4
This is used only on evidence searches. This is a very thorough search,
with team members shoulder to shoulder on hands and knees, clearing
brush down to bare earth and looking for small evidence items such as
weapons, bullet casings, bone fragments, etc. Urban
This is a type 1 or type 2 search in an urban setting rather than a
wilderness setting. Searchers are asked to look for hiding spots and be
more alert to the possibility of criminal acts associated with the
missing person. They must also be more aware of hazards associated with
urban settings to include traffic, animals, private property,
industrial sites, chemicals and confined spaces. Search Theory
Search is an Emergency
A SAR response must be rapid and effective. The subject may need
emergency care, may not be able to protect himself or herself from the
environment, time and weather destroy clues and an urgent response and
deployment of resources may reduce the size of the area that must be
searched. The chance of success is directly related to the size of the
search area. The search area may be small (easy) to large (hard). To respect the subject's emergency, modern search theory dictates that:
- Respond urgently
- Search at night
- Mobilize quickly and keep searchers in the field
- Create an atmosphere of positive urgency
Search is a Classic Mystery
Trying to determine what happened will often lead searchers to the
subject. All of the clues are usually there if the search manager
properly investigates interviews and interprets information from the
field.
- You must know what clues to look for
- Determine possible destinations
- PLS must be identified
- Must recreate the circumstances behind the disappearance
- Subject might be somewhere else
Search for Clues
There are more clues than subjects. Every subject on land leaves clues
such as scent, tracks and other disturbances. Clue detection will
substantially reduce search difficulty. Concentrate on issues that are important to the search
success and under the control of the manager. It is a waste of time,
energy, effort and money to do otherwise. Weather, terrain, subjects
actions are all beyond the control of the manager or the search teams.
- Know if the subject leaves the search area
- A search without a subject is nonsense
- Search difficulty increases rapidly unless you confine the subject to a small area
- Check all possibilities including home, hospitals, friend's etc.
- Grid search as a last resort. It is not an efficient use of resources.
Planning Data
Information required for adequate search planning:
- Category of the subject, hiker, hunter, child, elderly etc.
- Point Last Seen PLS or Last known Point LKP
- Circumstances of loss
- Length of time since last seen or overdue
- Subjects trip preparations
- Experience
- Physical condition of subject
- Medical condition of subject
- Personality traits
- Weather then, now, future
- Terrain analysis
Searching Data
The information that each searcher needs to know. Without this information, it is senseless to commit teams to the field.
- Name to call
- Clue information, (Clothing, equipment etc.)
- PLS or LKP
- Search area assignment
- Command structure
Point Last Seen (PLS)
This is determined by someone who actually saw the person and can
pinpoint where they were on a map. This is useful if the point is
somewhere along the intended route of travel or at location within the
search area. It is useless when the PLS is the subjects home as they
were leaving on the trip. Such as the wife who reports her husband
overdue on a hunting trip. Last seen as he drove away and was going to
hunt somewhere in western Washington. Last Known Point (LKP)
LKP may be more useful in some cases than a PLS. It may be the subjects
car parked at the trailhead, the abandoned campsite, the verified piece
of equipment found abandoned in the woods, the subjects signature in a
summit log book. No one actually saw the subject there but evidence and
clues are just as good to place the subject at that location at some
point after they left on the trip. All these items narrow the search
down and refocus it. There may be only one PLS but there may be several
LKP discovered as clues are found and verified. Likely Spots
A likely spot is any place that may attract a lost person or a
geographic feature that could be the cause of the subject being
overdue. Examples may include water, mine shafts, caves, shelters,
viewpoints. Geographic features that can cause problems include steep
terrain, fast rivers, switchbacks, cliffs, drainage's and terrain that
tends to direct a person's direction of travel. These are places to
search first with hasty teams and things that search teams should be
alert for while they search. Trying to determine what happened to the
missing subject is a significant part of any successful search. Confinement
This is a tactic used to limit the area of the search. By establishing
road blocks, trail blocks and putting boundaries up that the subject
should not cross the area that must be searched initially is limited.
It must be done early and at a distance far enough from the point last
seen or the Last known point that the subject cannot have already
passed by that location. This is of limited use and is not often
utilized. Attraction
The use of lights, horns, voice checks, whistles, smoke or any other
device for visual or audible signaling can be used to alert the missing
subject to the direction they need to travel to find help. Most
subjects found by hasty teams are found with voice checks long before
there is a visual sighting. The concern regarding the use of attraction
is the potential for drawing the subject into a hazard if they try to
travel to the signal at night when visibility is poor. Trying to walk
to a horn or a light the subject could walk off a cliff. Tracking
All search teams should have some tracking training. Finding tracks or
other signs of a subject passing are excellent tools in reducing the
size of a search area. The most significant problem with tracking is
making sure the sign or track is in fact made by the subject who is
missing and not by some other person or searcher. Clue Aware
Searchers must be made clue aware so they do not overlook the potential
clue left by a subject. There are far more clues in a search area than
there are subjects. Clues include abandoned camps, equipment and
clothing, candy wrappers, footprints and scuff marks, smoke from a
fire, emergency signals, voice response to voice checks.
- top -
- Proudly maintained and updated by Kyle Jadin -
|