BASE checklist acronymn - Safety / Training
B = Buildup A = Attitude
S = Site
E = Equipment
What does this mean?
Buildup - have you prepared appropriately for the type of jump you are doing? Have you got the prerequisite skills and experience? Buildup is mainly to do with training and experience or preparation for a jump.
Attitude - is your ego (we all have one - its only the magnitude that varies

Site - this is all about site selection. Have you done a site assessment? Are the weather conditions appropriate? Are both you and your equipment compatable with the site you are about to attempt?
Equipment - are you using BASE specific equipment that suits your size, experience, and flying style? Is your equipment correctly configured for the type of jump you are planning? Do you have a plan B and will your equipment be able to cope with this if your first plan does not work?
Basically, we need to look at:
- the persons history
- the persons current state (mind, body, experience)
- the jump site
- the equipment
Stay Safe
Have Fun
Good Luck

Anyone got a better prejump checklist acronymn? Most pilots use these when flying.