Here ya go. A very simple explanation of the symbols

http://www.fwthunderbirds.org/IMAC/a...20maneuvers%22

Basically they are called Aresti diagrams,

A dotted line is inverted flight, a blank triangle is a positive snap, a filled in triangle is a negative snap and half of a triangle is a half snap, a line with an curved arrow through it is a roll with the direction of the roll at the pilots discretion, a line with an curved arrow attached to it is a half roll, the direction of the roll is at the pilots discretion, a line with an arrow and a fraction means part of a roll so 3/4 would be 3/4 roll while rolls that say 3/4 with a 4 below are 3 points of a 4 point roll.

Go to this link, join TFC and look over the 2006 IMAC videos in the Aerobatic section, it gets a lot easier when you can visualize it.

http://www.teamflyingcirkus.com/newi...hp?page=Videos

Also, Dean Bird and I created individual help documents regarding certain aspects of IMAC flying and competitions. There are a total of 15 documents, all can be found here with links at the bottom of each row to doanload all 15 at the same time. In those docs are links to specific things on how to read Aersti and rules and juding and etc...

http://www.teamflyingcirkus.com/newi...?page=imactips

Barry, here's a link to the FAI Catalogue. This contains all of the Aersti maneuver. It's really dry reading but worth it if you want to compete.

http://www.fai.org/aerobatics/catalog/