FF WILDLAND HANDBOOK Flashcards
WORK TO REST RATIO
2:1
Max time for fire shelter deployment
25 seconds or less
LACES
Lookouts
Awareness
Comms
Escape Routes and Safety Zones
5 Basic Communication Responsibilities
Briefings Debriefings Warnings Ack. Messages Questions
4 Questions for an Order Given
Task to be performed?
Known Hazards?
Where do I go to be safe?
How do I get to this safe place?
Wildland Human Hazards
Attitude Phy. Conditioning Training Levels Experience Fatigue Critical Stress Sickness Sanitation (Food)
2 Rules for Unsafe Areas
Make it Safe
Avoid it
Common Denominators of Fatal Fires
- Small Fires/Isolated parts of large fires
- Light fuels
- Chimneys, gullies, steep slopes
- Shift in wind direction or speed
- copters/tankers modifying fire behavior
7 factors that kill teamwork
- Poor Communication
- cliques
- Poor work ethic
- Lack of Respect
- Complacency
- Blaming Others
- Selfishness
Primary force behind changes in fire behavior
Wind, RH, Temp, Precip
Layer of atmosphere closest to the ground
Troposphere
Ultimate weather source
Sun
4 Temperature Changing Factors
- Moisture/Pollution in the Air
- Angle between surface of the Earth and Sun
- Lag time between Solar radiation striking Earth and bent back
- Surface terrain and vegetation
Passing warm front wind shift
45-90 degrees
Cold front wind shift
<45->180 degrees
Surface winds measured at
20 ft
High pressure feature
Ridge
Low pressure feature
Trough
Thunderstorm life expectancy
<12 hours
Relative Humidity defined
Ratio of water vapor in the air versus greatest amount possible at the same temp
Most influential winds to flame front
Mid flame
3 signs that a mature thunderstorm is producing down drafts
- base of clouds rolling
- Virga hangs under
- dust cloud on ground
Every 20 degree increase in temp, RH decreases _______ point
1/2
20 degree temp drop RH __________
Doubles
Dew point defined
100% air saturation
Air temp increases, dew point _________
Same
Change in temp caused by change in altitude (per 1000 ft)
Dry-5.5 degrees
Moist- 3 degrees
3 types of inversions
Nighttime, marine, Subsidence
Stages of a Thunderstorm
Cumulus
Mature (Anvil)
Dissipating
Downdrafts extend _______ miles
10
Clouds by elevation
Cirro above 20,000
Alto 6500-20,000
Strato- < 6500
Steep Country good spot for fire line is ________
Ridges