What
do you do when a compass breaks or the GPS just doesn’t seem to be working
right? Here are a few suggestions that
will help the navigator.
The theme of
this post is to discuss what options the backcountry navigator has with
equipment that might not be working correctly.
When
equipment does not appear to provide the correct indication (such as the GPS
bearing to the trail head) it’s time to stop.
Never rush navigation. Stop and
take the time to really look over the information provided. Consult with the rest of the group.
Being able to
recognize the proper operation of the hiker’s equipment is important. This is obtained through field checks well
before any trip. The gas stove can be
tested at home before the journey. The
navigation kit can be evaluated throughout the year at the local park or
forest. I recommend to the elk and deer hunters in my GPS classes to take their
receiver everywhere they go for two weeks prior to leaving for camp. Push buttons, change displays, mark a waypoint
and finally, return to a destination.
Like a pilot of a plane, a map, compass and GPS are the instruments in
the backcountry cockpit.
Normally a
magnetic compass’ needle rotates freely.
The needle rotates on a jeweled pivot point. The magnetic compass should be kept level while
in use allowing the magnetic needle to move about in the compasses housing. My Suunto recently just stopped rotating. I would change direction about 30 degrees and
the magnetic needle would move about 15 degrees and then just hang up.
Sadly, there
is no simple in the field fix for this.
I gently tapped the compass body and checked the movement of the housing
but nothing seemed to work. Never let
broken gear clutter your pack or be used mistakenly.
A back up
compass is very helpful in such a situation.
It doesn’t have to be expensive, just reliable. No matter what you use for a back up, it has
to work well and requires testing. I
take all my new compasses to a location in town where the streets run north and
south (degrees true.) I will hike the
streets insuring that the compass is on the mark. This only takes a few minutes. Recently I noticed that one of my small ball
compasses seemed to be at least 20 degrees off; it’s a goner. Note, that a small back up compass may not be
as precise as your primary model. Also recognize
that some compass will only provide a trend of direction such as moving in a
northerly direction as opposed to tracking on a direction of 025°.
Before
throwing a quality compass out, contact the manufacturer to see what the
warrantee offers.
So what does
the hiker do if the GPS receiver appears to be broken?
The following
are steps that I’ll perform:
1.
If
I have a GPS with an electronic compass I’ll ensure the compass is
activated. For example on the Garmin 60
series, pressing and holding the “page” button with turn the compass on or off.
2.
I’ll
ensure the electronic compass is calibrated.
The compass must be calibrated after each battery change.
3.
Check
the charge on the batteries. If in doubt
replace them.
4.
When
the “Go To, Find or Where Is” option has been selected, older models will
require motion to cause the compass arrow and displays to adjust. Take five or more steps and see if there are
any changes with the display.
5.
Turn
the GPS receiver off, open the battery case and remove one battery for about
twenty seconds, return the battery and power up the receiver again.
6.
Once
powered up, I want to be certain that the receiver has captured the signals
from at least four satellites.
7.
Worse
case - call the manufacturer. Call early
in the morning.
In the field,
I leave my receiver powered on, collecting data the entire trip. I keep my receiver in a holster that attaches
to one of my shoulder straps. Before
leaving the trail head I “dump the junk” and get rid of old waypoints (e.g.,
last year’s fishing trip hot spots), I reset data fields on the odometer page
and I will clear out my track log. As I
hike, my receiver is collecting all my trail data. Should my receiver’s compass display fail I
can follow my track (the “bread crumb trail” on the map page) back to the trail
head.
Lastly, I
will consult my map. Using the major land features (e.g., ridge lines, peaks,
etc.) I will orient the map, determine my location (using terrain association) and
direction of travel.
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