In 2013 are you using a tech computer (as a computer) or BT for your tech diving?

[KD8NPB]

HLplanner VPM tables + Cochran EMC20H as backup / bottom timer.

There's an old capillary depth gauge in my thigh pocket in case the computer fails completely.

 

[mk706]

Petrel and Predator backed up with a dive plan and cut tables.

Love the Shearwaters.

 

[shoredivr]

Cut tables with V-planner, bottom timer, Nitek Duo in gauge mode.