Retractable Dive Slate
Clips to your BCD "D" Ring. Just pull it out and write a note to your dive buddy with the attached pencil. Halojumper.com Staff used these during our "Jump & Dives" to communicate to each other and the jumpers or divers on the Oriskany.
To retract the slate just push the tab on the black retractor and the slate moves back to your BCD out of the way.