Get those questions in quick; I'm off skiing at the weekend and will not be checking my email / Catsailor for about 9 days, sloppy I know, but I need to ski....

With the list as it is, it is dificult to see what configuration we are talking about.
Lets take one class for example: Dart 16.
You can say:
Dart 16 (or Sloop) and you are talking about a Dart 16 with 2 sails and 2 crew.
Dart 16, Cat boat, That is a Dart 16 with 1 sail and 1 crew (the definition of a cat boat is a boat with 1 sail.)
Dart 16 SPi, Dart 16 2 crew, main, jib & spi.
When people started sailing the Dart 15 singlehanded with 2 sails, it was called a Dart 15 Sprint.
There are references to F16 Cat boat and FX-one cat boat - this should be the 1 crew, 1 sail version, but it seems to be referring to the boat, singlehanded with a spinnaker <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" />.
Am I completely wrong here ?

P.S. A Dart 16 Cat Boat has "no rating" - This is just a Dart 16 with 1 crew and 1 sail - there must be a number for that ! The Dart 18 Cat boat is listed (1 Crew, 1 sail)