I did not want to muddy the waters in my previous explanation but, yes, you are
correct that the terminology varies from RR to RR & from location to location.
It should be noted that if the track grade is down hill towards the switch
(whether facing point or trailing point) so that the cars will start to roll by
gravity when the brakes are released, both types of drops are very easy because
the loco can take as long as wanted to move over the switch and get in the
clear. There is no out-racing of moving cars nor the throwing of any switches
in front of moving cars. On the CBQ/BN it was called a "Gravity Drop". In the
later years of the BN a gravity drop was the only kind of drop that was
officially allowed. That is not to say that the other types were not done on
the sly.
Where I worked on the PC...
They called a gravity drop a "Drop".
They called a straight Drop (facing point drop) a Dutch Drop.
They called the more complex trailing point drop a "Double Dutch drop".
Are you confused yet :-) So when some old head mentions a "Dutch Drop" you need
to clarify which type of drop he is talking about.
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