17 FORCE ~ VELOCITY Rule of thumb: Stay out of current over your knees VELOCITY POUNDS POUNDSFT/S M.P.H ON LEGS ON BODY5ft/S=3.4 M.P.H10ft/S=6.8 M.P.H20ft/S=13.6 M.P.HRule of thumb: Stay out of current over your knees
18 Determine Velocity100 FTMEASURE THE TIME IT TAKES AN OBJECT TO FLOAT 100 FTNote: with a 10mph current an object will travel one mile in six minutesThis can help you predict the distance a victim has traveled from point of entry.
57 Loads Top Loads – things that float Suspended load – heavy objects that can’t float but move with the current; more dangerous because they can’t be seenBottom Loads – stationary and non-stationary objects on bottom; can cause foot entrapment
58 Vehicle BehaviorComment: Cars on paved surface tend to move, more likely to roll. Gravel surface tends to scour gravel around tires causing vehicle to settle in.
59 Hypothermia Rescuer With No Thermal Protection Temperature Useful Work Unconscious40 degrees 7.5 minutes 30 minutes50 degrees 15 minutes 60 minutes60 degrees 30 minutes 120 minutes
60 Panicking VictimSeveral rescuers die every year because they did not recognize the signs of panic and made contact with the victim, only to be overpowered by the panicky victim.Never allow a victim that is in a state of panic make contact with you.
83 Stabilization Line Allows victim to maintain head above water
84 Snag Line A line which is used to pull victim free from entrapment
85 Stabilization/Snag Line Requires quick deployment and people on both sides of river Comment on difference between stabilization lines and snag lines.
86 Row Boat Options – raft Boat Techniques/operations – Row or paddle Highline2 or 4 point tether
87 Row (boat operations)Boats Provide a Safe Platform for Rescuers to Go to the VictimCan Be Controlled From Shore With Tether LinesCan Be Used to Access Hazard Areas of the RiverCan be used to search waterways
88 Paddle crew training on upper Salt River Paddle crew training on upper Salt River. Note paddle Captain in rear using rudder stroke