Blitvich et al reported several equations for predicting the depth of a dive. This can help to identify a dive that is high risk for spinal cord injury. The authors are from the University of Ballarat and University of Western Australia.
Types of dive:
(1) deck (from deck level to swim 25 meters)
(2) block (start block to swim 25 meters, with block 0.75 meters)
(3) running (running dive to swim 25 meters)
(4) treadwater (from deck level to tread water)
Parameters:
(1) angle of entry in degrees
(2) velocity of maximum depth in meters per second
(3) distance at maximum depth in meters
(4) flight distance in meters
(5) swim rank (from 1 to 5 with 1 very poor and 5 very good)
(6) height in cm
|
Parameter
|
Deck
|
Block
|
|
angle of entry
|
0.0072
|
|
|
velocity of max depth
|
-0.0573
|
|
|
distance at max depth
|
0.2520
|
0.3870
|
|
flight distance
|
-0.3170
|
-0.3250
|
|
swim rank
|
|
-0.0487
|
|
height
|
|
-0.0046
|
|
constant
|
0.27
|
0.58
|
|
Parameter
|
Running
|
Treadwater
|
|
angle of entry
|
0.01104
|
0.0141
|
|
velocity of max depth
|
-0.14
|
-0.2250
|
|
distance at max depth
|
0.31
|
0.1260
|
|
flight distance
|
-0.303
|
|
|
swim rank
|
|
-0.0558
|
|
height
|
|
|
|
constant
|
0.24
|
0.43
|
predicted depth of dive in meters =
= SUM(product of coefficient and parameters) + constant
If the predicted depth of the dive is greater than the water depth then the diver is at high risk.
