for everyone and anyone who is passionate about the diving industry. Whether you’re a loyal attendee or this is your first DEMA Show, the Show is a MUST-attend event if you want to experience the latest industry trends and develop business and professional relationships in a face-to-face setting unlike any other.


275+ Education Sessions

26% of attendees are NEW to DEMA Show each year

85% of attendees come to DEMA Show to evaluate and demo new products

Submersible Systems, Inc.

Huntington Beach,  CA 
United States
  • Booth: 1261

Spare Air - The Diver's Reserve Parachute

"I never thought it would happen to me....but on the night I ran out of air, it nearly cost me my life," shares Larry Williamson, Inventor of Spare Air. Submersible Systems is the manufacturer of Spare Air, the Original Miniature Breathing Device for scuba divers. Spare Air is the obvious emergency system choice - it is easier than buddy breathing and simple to use. Just put Spare Air in your mouth and breathe. It's that easy. Log on to our website at to find out the ''21 Ways Divers Run Out of Air" and "Why Sharing Air is Not the Solution" as well as view over 100 Testimonials from real-life customers in real out of air emergencies. Join the Ranks - Over 300,000 discriminating divers like yourself have chosen Spare Air. Celebrating 40 years of saving lives! SPARE AIR - BECAUSE SELF-RESCUE IS THE ULTIMATE BUDDY.


  • Spare Air Model 300
    The preferred choice of recreational SCUBA divers!...

  • Complete Spare Air package includes:  3.0 cu.ft. Spare Air, Covered Holster, Safety Leash & Refill Adapter

    A skydiver wears a reserve parachute, a SCUBA diver should have a reserve breathing system. For 40 years we’ve supplied divers with the smallest, most-compact redundant system available for out-of-air-emergencies. The patented SPARE AIR should be a standard piece of SCUBA diving equipment for the safety minded diver. In an out-of-air-emergency, why would you trust your life to anything else?

  • Spare Air Model 600
    Introducing Spare Air's Big Brother - 6.0 cu.ft. of Live-Saving Air!...

  • Spare Air is the original emergency breathing device for out-of-air emergencies. Celebrating 40 years & introducing the new Spare Air 600 – twice the capacity of Spare Air 300. Weighing less than 4 lbs, it's the lightest system on the market & priced competitively compared to other systems.

    •           Refillable from a scuba tank or air compressor

    •           Easy to Travel with

    •           Comes with Refill Adapter, Holster & Safety Leash

    •           For self-rescue or to pass to another diver in an emergency

    With 4 Spare Air models to choose from, now there is a model for every diver! Spare Air is the Diver's Reserve Parachute.

  • EasyDive Kit
    EasyDive Kit – Innovating the Undersea Experience...

  • The EasyDive Kit is a complete minimalist dive & snorkel system. Weighs in at only 15 pounds and provides up to 30 minutes of air! Lightweight and small, it can be donned in seconds. Perfect for quick response to items dropped over-board, verifying anchor location, prop clearing, pool maintenance, and much more! Includes a 19 cu.ft. Cylinder, Custom Harness, Tank Valve/1st Stage combo, 2nd Stage Regulator, Mini Pressure Gauge, Air Compressor Refill Adapter & the patented Snorkelator.