Scuba Dive Equipment Checklist
I copied the following checklist from the PADI Open Water Diver Manual. I figured having this list online would be easier than taking my copy of the manual everywhere I go 
Basic Equipment
- Gear Bag
- Fins, Mask, Snorkel
- Wet Suit
- Jacket
- Pants
- Vest
- Hood
- Boots
- Gloves
- Weight Belt
- BCD (Buoyancy Control Device)
- Cylinder (filled)
- Regulator (with SPG and alternate air source)
- Compass
- Depth Gauge
- Knife
- Watch
- Surface Signaling Device
Personal Items
- Swimsuit
- Towel
- Jacket
- Extra Clothes
- Money
- Tickets
- Certification Card
- Log Book
- Dive Tables
- Sunglasses
- Suntan Lotion
- Medications
- Toilet Articles
- Lunch, Thermos
- Eating Utensils
- Ice Chest
- Sleeping Bag
Accessory Equipment
- Float and Flag
- Thermometer
- Dive Light
- Slate and Pencil
- Marker Buoy
- Buddy Line
- Camera and Film
- Lift Bag
Spare Equipment
- Cylinders (filled)
- Weights
- Straps
- O-ring
- Tools
- Regulator HP Plug
- Bulbs and Batteries
- Nylon Line