Nav wrote:
Are you saying that the rudder effrectiveness is not reduced if the
engine is stopped?

I'm saying that many of the statements made about why the Titanic hit
the iceberg, with regard to her rudder's ineffectiveness, are incorrect.

As for "engine stopped" that is not a very useful terminology... you
mean shaft stopped & locked? Applying throttle in reverse? Spinning in
reverse with forward way on?

*If* the Titanic's central shaft had been either stopped & locked, or
spinning in reverse with forward way on, then of course her rudders
effectiveness would have been reduced. However neither of those cases
apply for several reasons, the main one being that her central shaft had
no reverse and could not have been stopped & locked.

Regards
Doug King