Underwater Signal Transmitters

Dive Alert Plus v2

41 reviews

SKU: AQUDPV3

^$91.95

+ wishlist

In Stock

DESCRIPTION

A small and lightweight signaling device that emits a piercingly loud sound both underwater and on the surface.

Pros

Can be used both underwater and on the surface
Powerful and attention-grabbing sound
Easy to install and use
Versatile and effective signaling device
Reliable and good customer service

Lazer-Stik Battery Powered Marker Light, Constant-On

38 reviews

SKU: AQULSBL

^$18.95

+ wishlist

In Stock

DESCRIPTION

A reusable and eco-friendly marker light with high visibility up to 1500 feet, suitable for divers.

Pros

Highly visible and bright light
Inexpensive and good value
Easy to use and waterproof
Versatile and lightweight
Long-lasting and reliable

Suunto Tank POD Transmitter for EON/D5 Dive Computer

10 reviews

SKU: SQTPOD

^$439

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In Stock

DESCRIPTION

A wireless tank pressure transmitter that provides a quick and easy view of tank pressure for Suunto EON/D5 Dive Computers.

Nautilus Life-Line Marine Rescue GPS

8 reviews

SKU: AQUNLMR

^$199

+ wishlist

In Stock

DESCRIPTION

A waterproof and durable Marine Rescue GPS that sends individual and relay distress alerts.

Mares LED Tank Module

8 reviews

SKU: MRSQT

~~$339.95~~ Save: $40.95 (12%)

^$299

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In Stock

DESCRIPTION

A Mares LED Tank Module with RF transmission, LED indicator for tank pressure, and streamlined dive profile.

Oceanic Transmitter, Black

5 reviews

SKU: OCNAT1T

^$399.95

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In Stock

DESCRIPTION

A streamlined black transmitter with ATR and DTR features, easy installation, and replaceable batteries.

Ocean Reef GSM Gdivers Communication System, Yellow

4 reviews

SKU: OEDGCS

~~$499.95~~ Save: $40.95 (8%)

^$459

+ wishlist

In Stock

DESCRIPTION

A yellow underwater communication system that enhances safety and enjoyment with ultrasonic technology.

Ocean Reef Snorkie Talkie for Aria Full Face Mask

4 reviews

SKU: OEDST

^$79.95

+ wishlist

In Stock

DESCRIPTION

A compact and waterproof communication unit designed for the Aria full face mask, allowing surface voice communication.

Scubapro Hud Sport Dive Computer with Smart + Pro Transmitter

3 reviews

SKU: SCPHSPT

^$999

+ wishlist

In Stock

DESCRIPTION

A revolutionary mask-mounted dive computer with near-eye optics, wireless air integration, and advanced features.

Scubapro Transmitter Smart + Pro

3 reviews

SKU: SCPTSP

^$369

+ wishlist

In Stock

DESCRIPTION

A low-profile smart transmitter with air integration, built-in LED, and pressure display up to 4350 psi.

Garmin Descent X50i Dive Computer with T2 Transceiver

2 reviews

SKU: GRMDX50IC

^$1999.98

+ wishlist

In Stock

DESCRIPTION

A 3" vibrant color touchscreen dive computer with sonar messaging and integrated tank pressure monitoring.

Garmin Descent T2 Transceiver

1 reviews

SKU: GRMDT2T

^$499.99

+ wishlist

In Stock

DESCRIPTION

A dive-rated transceiver that tracks up to 8 tanks and allows diver-to-diver messaging with compatible dive computers.

Shearwater Tern TX Wrist Dive Computer with AI Transmitter

1 reviews

SKU: SWTTRNXC

^$1155

+ wishlist

In Stock

DESCRIPTION

A modern, sleek wrist dive computer with AI transmitter for reliable, air-integrated diving with next-gen tech intelligence.

Ocean Reef Surface Unit and Snorkie Talkie

1 reviews

SKU: OEDSTPKG

~~$112.90~~ Save: $15.90 (14%)

^$97

+ wishlist

In Stock

DESCRIPTION

A complete underwater and surface communication system with easy installation and a waterproof rating of IP68.

Shearwater Swift Next Gen Smart AI Transmitter

1 reviews

SKU: SWTT

^$400

+ wishlist

In Stock

DESCRIPTION

A next-gen smart AI transmitter that offers reliable multi-transmitter use, 300 dive hours, and instant LED feedback.

Garmin Descent Mk3i 43mm Dive Computer with T2 Transmitter, Bronze PVD Titanium/French Gray Silicone Band

1 reviews

SKU: GRMDMK43F

^$1899.98

+ wishlist

In Stock

DESCRIPTION

A dive computer and transmitter set with GPS, ABC sensors, and 100-hour battery life, rated for 20 ATM.

Garmin Descent Mk3i 51mm Dive Computer with T2 Transmitter, Carbon Gray DLC Titanium/Black Silicone Band

SKU: GRMDMK51BP

^$2099.98

+ wishlist

In Stock

DESCRIPTION

A durable, feature-rich dive computer with GPS, bathymetric maps, and a long-lasting battery.

Garmin Descent Mk3i 51mm Dive Computer with T2 Transmitter, Carbon Gray DLC Titanium/Titanium Band

SKU: GRMDMK51TP

^$2299.98

+ wishlist

In Stock

DESCRIPTION

A durable, feature-rich dive computer with GPS, ABC sensors, and DiveView maps, paired with a reliable transmitter.

Ocean Signal rescueME MOB1

SKU: OCLSMOB1

^$384.95

+ wishlist

In Stock

DESCRIPTION

A compact, waterproof AIS beacon with integrated GPS, DSC alarm, and strobe light for rapid overboard rescue.

Garmin Descent X50i Dive Computer

SKU: GRMDX50I

^$1499.99

+ wishlist

In Stock

DESCRIPTION

A 3-inch touchscreen dive computer with sapphire lens, 20 ATM rating, and SubWave messaging technology.

Garmin Descent Mk3i 43mm Dive Computer with T2 Transmitter, Carbon Gray DLC Titanium/Black Silicone Band

SKU: GRMDMK43B

^$1899.98

+ wishlist

In Stock

DESCRIPTION

A durable and feature-rich dive computer with a long-lasting battery life and superior positional accuracy.

Aqualung i770R TX Dive Computer with Transmitter, White/Petrol

SKU: UDRIT17

~~$1099~~ Save: $300 (27%)

^$799

+ wishlist

In Stock

DESCRIPTION

A durable, hoseless dive computer with multi-gas support, Bluetooth readiness, and bright display.

Salvimar Shaker Underwater Communication Device

SKU: SLVAP031

^$40.95

+ wishlist

In Stock

DESCRIPTION

An essential scuba safety tool providing reliable audible signals for effective underwater communication.

Buddy Phone for Full Face Mask, 2 Channels

SKU: OTSBPG

^$999

+ wishlist

In Stock

DESCRIPTION

A digital ultrasonic communicator with 2 channels for clear speech between divers and surface, with a 500m range.

Nautilus Lifeline Marine Rescue GPS with Neoprene Pouch

SKU: AQUNLMRA

^$219.99

+ wishlist

In Stock

DESCRIPTION

An easy-to-use, waterproof marine rescue GPS with a durable neoprene pouch for secure attachment.

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Underwater Signal Transmitters

As the water warms and dive sites across the globe come alive with activity, underwater signal transmitters have become essential tools for divers, snorkelers, and underwater photographers seeking to enhance both safety and communication beneath the surface. These advanced devices are engineered to transmit crucial information—ranging from tank pressure and air consumption to real-time diver-to-diver messaging—using reliable technologies like sonar or specialized Wi-Fi. Whether you’re exploring a vibrant coral reef, conducting scientific research, or capturing marine life on camera, signal transmitters offer a new level of connectivity that transforms the underwater experience. For those who often dive with a buddy or in groups, these transmitters can foster seamless coordination, allowing for preformatted safety messages or even voice communication when paired with compatible full-face masks. This is particularly valuable during deeper or more technical dives, where instant access to your team’s status can make all the difference. For underwater photographers and videographers, certain transmitters enable remote camera control from a smartphone, letting you adjust settings such as aperture, ISO, and shutter speed without surfacing—an innovation that opens creative possibilities while keeping your hands free for other tasks.

The appeal of underwater signal transmitters extends beyond just experienced divers. New divers, instructors, and even families exploring the ocean together can benefit from the peace of mind these devices provide. For parents introducing their children to snorkeling or shallow dives, transmitters that monitor air supply or enable quick messaging add an extra layer of safety and reassurance. Dive instructors and guides find them invaluable for managing groups and ensuring everyone stays connected, especially in areas with limited visibility or strong currents. These devices also make thoughtful gifts for anyone passionate about underwater exploration—whether it’s a friend preparing for a dive trip, a loved one interested in marine photography, or a colleague who enjoys the latest in dive technology. When considering a purchase, it’s important to think about the kind of diving you do most often. Some transmitters are designed for deep technical dives and offer robust waterproofing up to 200 meters, while others are optimized for recreational use or underwater photography. Battery life, compatibility with existing dive computers or cameras, ease of setup, and the range of transmission are all key factors to weigh. For those interested in voice communication, pairing a signal transmitter with a compatible headset can provide clear, hands-free conversations—learn more about these options on our Underwater Headsets page.

During the busier diving months, when dive boats fill up and underwater environments teem with activity, having a reliable signal transmitter can set your dive apart. Imagine gliding through a kelp forest, effortlessly exchanging updates with your buddy, or adjusting your camera settings on the fly to capture the perfect shot of a passing sea turtle. For scientific divers collecting data or conducting surveys, real-time communication and data transfer streamline the process, allowing for more efficient teamwork and accurate results. Surface-linked transmitters even make it possible to live stream your underwater adventures or access the internet while submerged, bridging the gap between the underwater world and those on land. As technology continues to evolve, signal transmitters are becoming more accessible and user-friendly, ensuring that divers of all skill levels can enjoy enhanced safety, convenience, and creative freedom on every dive. Whether you’re gearing up for a summer of exploration or planning your next underwater adventure, investing in the right signal transmitter can make every moment beneath the waves more connected and memorable.