Helisniper,
How, pray tell, do you believe that a pilot in England, or on a tech stop at Sumburgh, could possibly have checked that the tarp (or whatever the FOD was) was secure.
We are not supermen, y'know.
Demanding 6Sigma QA stuff is for bureaucrats and office girls. Not for pilots.
One can reasonably expect that the Bo'sn and the bridge officers are seamanlike enough to take reasonable precautions before declaring "deck is clear".
My sympathies are primarily for the PIC. Very much secondarily for the Bo'sn and bridge officers who must be feeling like **** right now.