Monday, October 17, 2011

Human Tracking Lesson



I attended another Joel Hardin Professional Tracking Services class this weekend where I received my first certification that allows me to now be called out on law enforcement and SAR tracking operations.  After a gruelling 2.5hr oral examination before the board of directors that is.....

But the class was beneficial in other ways than getting certified.  First off, seeing Joel in action is pretty amazing no matter how much you see it (and I havent seen it all that much quite frankly...only being in this game for 1.5yrs so far...).  But it really is amazing how Joel can categorize sign and understand different variables that allow him to piece the puzzle together.  One important lesson he taught me this weekend I will share below.

Aging is a term often used among trackers, whether it be animal tracking or human tracking.  Aging is one of the most important pieces of evidence a tracker has at his disposal.  It allows you to understand when the sign was made and what has happened since it was made.  Being able to properly date sign is critical in a law enforcement or SAR incident, because if you are chasing a track that was made six months ago but your subject went missing 2 days ago, it doesnt do you much good! 

Herein lies the rub.  Because as important as aging is, it isnt always the easiest thing to pick up on.  By running experiments on different vegetation - ie, cut a blade of grass and watch its healing process over a few days to see how long it takes colors to change, chlorophyl to dry up, etc., you can get a good appreciation for how to age.  But Joel's lesson to me this weekend was a big step above that.

Our sign was made on a dirt road that was pretty fine grits of dirt and sand.  It then meandered across grass and into the woods.  There was tons of other sign in the area that was not our subject, so proper aging was critical to stay on the right path.  The footfall was pretty distinct on the road.  In fact, we could even read the "ISTANT" on the sole of the shoe from the words "OIL RESISTANT."  Joel showed us that on the imprint of the lugs, you can take a FINE weed and poke the lug. 

If it breaks off in a clump, like cookie dough, then it was made when moisture was in the air, which allowed the granules to clump together like cement. 

If it breaks falls apart completely like powder, it was made when there wasnt much moisture in the air, and there hasnt been any since it was made.

If it breaks off but the inner parts of the lug imprint are powdery, it was made when there was no moisure in the air, but since the time it was made, moisture has been in the air.  This was the case with our track.  What that told us was that our track was made between the hours of 12PM and 4PM the previous day.  We knew that because the morning dew didnt dry until 12PM.  Then we had 4 hours of very dry air before the humidity rose and the evening dew was cast on the natural state starting around 4PM.

Another interesting fact is that with a small magnifying glass, you can actually take a cross sample of the lug imprint (keep in mind we are only talking about a clump of dirt that is 1/4 of an inch big)...every dew cycle will leave a paper-thin sheet of crystalized residue on the track.  If you look through the magnifying glass, you can see the number of days old a track is by the layers of glossy sheen!!!

It was truly amazing and a very useful weekend.  Tracking is a truly wonderful skill to have and it is a very satisfying activity.  It is not voodoo.  It is not limited to a few sage people with the skill.  Everyone has the ability to see sign and track.  But as Joel will tell you, "What isnt looked for isnt found."  I encourage everyone to take a look at tracking as a great first-responder activity if you want to help out your local SAR and law enforcement teams.  More info on Joel's program can be found at:

http://www.jhardin-inc.com/web/

Tuesday, October 4, 2011

Importance of Understanding Weather

The past week we have seen a number of searches across the country for missing people who got caught in weather.  As fall approaches, it is a good time to review weather patterns and things to look for, as well as ways to stay out of trouble.  Over the years I have developed a rule: whatever the weather calls for, always have rain gear (even with 0% chance of rain) and always have enough to stay warm 15 degrees below the weather report and cool 15 degrees above.  Mainly because weather reports are almost always wrong…not because weathermen suck (although it is the one job in America you can be wrong at EVERY day and not get fired), but because, frankly, weather is constantly changing and can always sneak up on you. 

Also, I recommend for those spending a lot of time outdoors a good watch that has an altimeter and barometer on it.  Some watches like the Suunto Core have a “Storm Alarm” that goes off if the baro pressure changes too much over a short timeframe.  This is very helpful, though not always right.  Just remember if using these watches that they are calculated by pressure-based altitude.  So if your altitude is wrong, as it often will be, your baro will be wrong too.  Just make sure when starting your activity to match the alto on your watch to the alto on your topo map, and you should be good to go.

Ok, here are some pointers:

Identifying Hazardous Weather

        Check the forecast before you leave

        VHF radio

        Observation

        Mobile phones

Air Masses and Pressure

        Air moves from High to Low pressure areas causing wind

        As winds converge near a Low, it is forced to rise, causing cooling & precipitation

        As winds diverge near a High, it is forced to sink, causing warming & fair weather
Air Masses and Fronts

        Warm Fronts

          Gentle slope causing gradual rising, cloudiness, and precipitation along front

          Generally move northward

        Cold Fronts

          Steep slope causing narrow band of showers along or just ahead of front

          Generally move West to East

Cirrus Clouds

        High-level (20,000’ +)

        Generally fair weather

        Lots of these in the sky may indicate the weather will change in the next 24 hours.

Nimbus Clouds

        Mid-level (7,000’ – 15,000’)

        Steady precipitation

Stratus Clouds

        Low-level (0’ – 10,000’)

        Generally grey and dull weather

Cumulous Clouds

        Mid to high-level (7,000’ – 60,000’+)

        Generally fair weather

        If taller than wide, risk of thunderstorm development