Companionway and latches @39.24 m/s2

[Claude_Marie]

from : Series Drogue, ocean survival

1)
"companionway doors should be checked at a loading corresponding to a water jet velocity of approximately 15 ft./sec"

How do you check that ?

2)
"Safety straps designed for a load of at least 4g should be provided for crew restraint. All heavy objects in the cabin should be firmly secured for negative accelerations and drawers and lockers should be provided with latches or ties which will not open even with significant distortion of the hull structure"

Huh...4g (39.24m/s2), if latches (lockable) can endure that, not sure hinges will...

Else, Parachute vs Drogue ???

(I am not looking forward for a Ford vs Chevy discussion)