shen, think of it this way. what would *you* do IF 25% of ALL commercial
aircraft crashed before making it 20 years?

People have used basic "DR" to get from point A to B safely for
centuries,

no they have not used it "safely". a full 25% of ALL commercial ships in
the
final 50 years of sail powered shipping -- presumably the years of greatest
knowledge and skills in DR) sank before being taken out of service due to
age
(about 20 years usage)


Soooo, what your saying is that 75% of sailing vessels had full careers. The
other 25% may have made only one voyage or thousands of voyages before
sinking
or grounding prior to their 20 year demise.
Depending on how you manipulate the statistics, we can probably make this
sound
bad OR good.

Shen