Caz & Ark.
Can I summarise?
Two experienced pilots bowling along pointing at lump of rock, knowing a left turn coming up to fly along the coast.
They didn't. They flew into lump of rock.
Why?
Nobody knows. No proof of anything one way or the other.
At best, it could have been caused by factors beyond their control in the timescale and surroundings.
Ergo, should have not been found negligent - given the benefit of the doubt.
The rest is speculation that adds nothing of value to the cause.
FJJP