Ocean Technology DSI Full Face Mask 900017-003 027945

Mfg Part #: 900017-003
  • Includes:
    • Balanced 2nd stage regulator
    • Head harness
    • Supply hose
  • "Diver Adjustable" Airflow
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Can be used with hard-wire or through-water communication systems

Customer Reviews for Ocean Technology DSI Full Face Mask:

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Questions and Answers for Ocean Technology DSI Full Face Mask:

  • David:

    Hello how much does this mask weigh and is it in stock.

    Darrick  (Certified Scuba Instructor at Scuba.com):

    It weights 9 pounds and at this present time it is about a 2-3 day lead time from when your order is placed before this item can ship.

  • colin:

    Hi I have no cartilage in my nose so I can not use nose blocks to equalize my ears .So is it possible to squeeze my nose by hand ?

    Aaron  (Certified Scuba Instructor at Scuba.com):

    Hi Colin, With the mask on, you have to use the nose plugs.

  • mike:

    Ive tried equalizing using the supplied nose block but my nose is too wide..Is there any other nose block that I could try?

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello Mike, I have talked to the manufacture directly and they do not have larger post for the nose block system.

EXO-26BR Full Face Mask

The EXO-26BR full-face mask (FFM) is manufactured by Diving Systems International, Inc. The EXO-26 is commonly used for both hard wire or through-water communications. It comes standard with a built in 2nd stage adjustable regulator, head harness, and supply hose.

For underwater communications, we prefer the oral-nasal cavity model. An earphone/microphone assembly can be easily installed via a convenient port located on the right side of the FFM. Our EMX-2 earphone/microphone assembly is used for the non oral-nasal model (EX0-26) and our EMX-2B is used for the oral-nasal model (EX0-26BR).

What happens if my mask floods?

First off, due to the positive pressure inside the mask, it is very difficult to get water inside the mask. Even if you break the seal underwater, air will push water out instead of water coming in. Having said that, if you do manage to flood your mask, simply look up and press the purge button on your regulator. This will drain out the water. Resume normal position and take a hesitant breath to ensure all water is displaced. Repeat as necessary.

I need glasses. Is there a kit for this?

Yes! Contact your OTS salesperson to find out how to install the eye wear accessory kit made for the Guardian. Your mask is already set up to use this!

What happens if my mask fogs? Do I still need defogger?

Due to the unique air system of Full-Face Masks you do not need any defogging agent. Your mask will not fog!

What if I run out of air while diving a full-face mask? How do I buddy breathe?

If you are diving a full-face mask, it is highly recommended you are familiar with emergency procedures and are comfortable doing them underwater. Get in a pool and practice if need be. Read your manual!

It is highly recommended that you have a spare air supply octopus, pony bottle, etc. and a small spare mask on you. If you run out of air, remove your full-face mask, utilize your spare air and don your small mask. You cannot buddy breathe using a full-face mask.

Does the silicon material of the skirt degrade or lose shape? Is it as durable as rubber?

The silicone material is sturdy as can be and does not warp or degrade. You can fully expect for your Guardian Full-Face Mask to maintain its durability and shape regardless of how often you use it.


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