I make my own from Delrin with my initials cut into them.
Hello Devilscrowndiver,
After 25 years of mostly wreck diving around the UK, I'm going to get some cave instruction later this year. At the moment I'm reading forums to get some background knowledge.
I know what arrows and cookies are for, but what's the purpose of your beautifully made rectangular marker?
Regards,
Russ
Its a non-directional directional marker, which sounds a bit odd so follow me on this.
You have directional markers - Arrows
Non directional markers - cookies
Non directional directional marker is a cookie that is marked or created such that it gives information to you but not to others. i.e. Being lopsided you could orient it such that the larger side always points out of the cave. The person placing it know this, but anybody else coming accross it, it just looks like a cookie.