OTS Guardian Full Face Masks & Public Safety Dive Communications

Sink or Swim Scuba is an authorized OTS (Ocean Technology Systems) dealer supplying, servicing, and supporting the full line of OTS Guardian full face masks and diver communication systems for public safety dive teams, commercial divers, and search-and-recovery units across North Carolina, South Carolina, and nationwide. Whether you are outfitting a new dive team, standardizing masks and comms across an existing team, or keeping equipment mission-ready with genuine OTS parts and factory-correct service, this is where that work happens.

Why teams standardize on OTS Guardian

The OTS Guardian is one of the most widely deployed full face masks in public safety diving for a reason: it keeps a diver's face and airway sealed away from contaminated, black, or cold water while integrating cleanly with both hardwire and wireless communications. For a dive team working a recovery, an evidence search, or an under-ice operation, the ability to breathe in a contaminated-water environment and talk clearly with the surface and with other divers is not a convenience — it is a safety and operational requirement. The Guardian is built around exactly that need, which is why it has become a standard for fire, rescue, law enforcement, and commercial teams.

We help teams choose the right Guardian configuration — comms-ready versions, double face seal for contaminated-water work, positive-pressure options, and Buddy Phone compatibility — rather than selling a one-size mask and hoping it fits the mission.

Shop the masks: OTS Guardian Full Face Mask (comms-ready, ABV, double face seal, Buddy Phone compatible) · OTS Guardian Full Face Mask (black/black)

Diver communications: hardwire and wireless

A full face mask is only half of the system. The other half is how your divers talk. OTS builds both ends of that spectrum, and we stock and service both:

Wireless (through-water): The OTS PowerCom 3000D is a 4-channel, 25-watt wireless diver radio that frees a diver from a physical tether while keeping voice contact with the surface and other divers — well suited to search patterns and open recovery work where a hardwire line would snag or limit range. Pair it with the matching PowerCom 3000S surface station.

Hardwire (rope-based): For contaminated water, evidence integrity, and situations where the umbilical also serves as a tended safety line, hardwire is still the standard. The OTS MK-III 3-Diver Intercom surface station plus ComRope communication rope give you clear, reliable voice with the physical connection many public safety protocols require.

Shop communications: OTS PowerCom 3000D wireless diver radio · OTS PowerCom 3000S surface station · OTS MK-III 3-Diver Intercom · OTS CR-4 ComRope 4-wire hardwire

For a fuller explanation of how public safety divers communicate underwater and how to choose between hardwire and wireless, see our Public Safety Diving hub.

Parts, service, and keeping gear mission-ready

Equipment that sits in a truck between call-outs still has to work the moment it is deployed. We stock genuine OTS replacement parts and service kits and perform factory-correct maintenance on Guardian masks and OTS communications, so your team is not grounded waiting on a part or an out-of-service mask.

Shop parts & service: OTS Guardian FFM Service Kit (900417-001) · OTS Guardian ABV Maintenance Kit (900409-000) · OTS Guardian hot-mic dual-earphone PTT assembly · Browse all OTS Guardian repair parts & components

Need a mask, regulator, or comm unit serviced? Visit our Service & Repair page or contact us to schedule.

Outfitting a whole team — and trying before you buy

Buying one mask is simple. Standardizing masks, comms, and spares across an entire dive team — on a grant timeline or a department budget cycle — is not. We help agencies spec a complete, interoperable package: masks sized to your divers, a comms plan that fits your protocols, the right spares and service kits to stay mission-ready, and documentation that works for grant and purchasing requirements.

We also keep demo inventory and can arrange on-site or in-water demonstrations so your team can evaluate a Guardian and OTS communications in real conditions before committing budget. That matters when you are standardizing gear your divers will trust in zero-visibility water.

Work with us

Tell us what your team is running now and what you are trying to accomplish, and we will put together a real quote and a plan — not a shopping cart.

Request a Public Safety Dive Equipment Consultation

Sink or Swim Scuba supports public safety and commercial dive teams with OTS Guardian masks and communications, Interspiro Divator systems, training, and full public safety dive program support.