Setting up and using the Floataweigh “Tetra” to do hydrostatic weighing in a swimming pool.
Put the platform in the pool. 
Rotate the hanger slats up. 
Put the floats in the pool. 
Put floats above platform. 
Connect floats to platform. 
Sit on platform. Submerge. 
Hold still for 2 seconds. 
Weighing accomplished.