Underwater Signal Transmitters

XS Scuba Rattle Stick with Clip

15 reviews

SKU: XSSRSC

^$46

+ wishlist

In Stock

DESCRIPTION

A non-corrosive rattle stick with clip for easy noise source identification, featuring a magnetic cap.

Dive Alert Plus v2

40 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

Nautilus Life-Line Marine Rescue GPS

8 reviews

SKU: AQUNLMR

~~$244.99~~ Save: $45.99 (19%)

^$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

+ wishlist

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

+ wishlist

In Stock

DESCRIPTION

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

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

^$880

+ 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

^$315

+ wishlist

In Stock

DESCRIPTION

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

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 Tern TX Wrist Dive Computer with AI Transmitter

1 reviews

SKU: SWTTRNXC

^$1145

+ wishlist

In Stock

DESCRIPTION

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

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.

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.

Aqualung i770R TX Dive Computer with Transmitter, White/Petrol

SKU: UDRIT17

~~$1099~~ Save: $250 (23%)

^$849

+ wishlist

In Stock

DESCRIPTION

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

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.

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.

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.

Shearwater Swift Next Gen Smart AI Transmitter

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.

DiveVolk SeaLink Contact Type Underwater Wifi Signal Transmitter

SKU: DVKSCT

^$199

+ wishlist

In Stock

DESCRIPTION

A revolutionary device that connects your smartphone and camera underwater for seamless photography and monitoring.

Apeks Wireless Transmitter

SKU: APXT2CK

^$375

+ wishlist

In Stock

DESCRIPTION

A Wireless transmitter for streamlined diving with secure pairing and reliable Apeks compatibility.

Garmin Descent S1 Diver Communication Buoy

SKU: GRMDS1BUOY

^$2499.99

+ wishlist

In Stock

DESCRIPTION

A wireless signaling device enabling real-time diver communication, monitoring, and safety alerts via compatible Garmin technology.

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.

Garmin inReach Mini 2 Compact Satellite Communicator

403 reviews

SKU: GRMIM2BK

^$399.99

+ wishlist

In Stock

DESCRIPTION

A compact and lightweight satellite communicator with TracBack routing and digital compass for accurate heading information.

Pros

Good battery life
Compact and lightweight
Reliable messaging and tracking
Provides peace of mind and safety
Versatile and configurable

Storm Whistle

40 reviews

SKU: AQUWSYL

^$10.95

+ wishlist

In Stock

DESCRIPTION

A loud, all-weather whistle with a 120 dB rating for surface or underwater signaling.

Pros

Compact and lightweight
Loud and attention-catching
Effective in all conditions
Durable and reliable
Trusted brand with safety features

Blue Reef Deluxe Surface Marker Buoy (SMB)

33 reviews

SKU: BLRDBDS6OR

^$68.95

+ wishlist

In Stock

DESCRIPTION

A blue surface marker buoy for serious divers, with easy oral inflator and no-spill inflation option.

Pros

Good value for the price
Easy inflation and deflation
Versatile inflation options
Sturdy construction
High visibility

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Underwater Signal Transmitters

Whether you’re a seasoned diver exploring a remote wreck or a recreational snorkeler enjoying a summer vacation, reliable communication is a cornerstone of safe and enjoyable underwater adventures. Underwater signal transmitters are designed to bridge the gap between divers, dive leaders, and surface support, especially in environments where visual contact can be compromised by distance, currents, or low visibility. These devices use sound, light, or even vibration to send clear signals through water, ensuring you can get your buddy’s attention, signal for help, or coordinate group activities without confusion. Many divers recall moments when a simple tap on the tank or a frantic wave just wasn’t enough—signal transmitters offer a dependable alternative, giving peace of mind whether you’re navigating a bustling reef or exploring the mysterious blue beyond the drop-off. With summer in full swing and dive trips in high gear, these tools become even more essential, as increased traffic in popular spots can make traditional hand signals harder to spot.

When considering an underwater signal transmitter, it’s important to think about the type of diving you do most often and the environments you frequent. For those who dive in large groups or lead guided tours, a transmitter that can send signals over greater distances or through murky water can be invaluable for keeping everyone together and safe. Solo divers or underwater photographers, who may become absorbed in their surroundings, benefit from compact, easy-to-activate devices that let them quickly alert a buddy or the surface team if they need assistance. Dive instructors, rescue teams, and technical divers often rely on advanced signal transmitters with multiple signaling modes, ensuring they can communicate a range of messages without ambiguity. Even snorkelers and freedivers can find value in these devices, especially when exploring new areas or venturing away from the boat. Underwater signal transmitters also make thoughtful gifts for dive enthusiasts, particularly for those who are upgrading their gear or embarking on travel adventures. The peace of mind that comes from knowing you can communicate effectively underwater is a gift that resonates long after the wrapping paper is gone.

Selecting the right signal transmitter involves more than just picking the loudest or brightest option. Consider the build quality and ease of attachment—durable materials and secure mounting options are crucial, especially if you’re diving in challenging conditions. Battery life, activation method, and maintenance requirements should also factor into your decision. Some divers prefer transmitters that integrate seamlessly with their other equipment, such as mounting to masks or wristbands, while others opt for standalone units that can be easily shared or stowed in a pocket. For those looking to further enhance their underwater safety setup, pairing a signal transmitter with other gear like Reliable Underwater Bands can provide additional security and convenience. As you prepare for your next dive—whether it’s a spontaneous summer outing or a meticulously planned expedition—investing in quality underwater signaling equipment ensures you’re ready for whatever the depths may bring. The right transmitter doesn’t just improve communication; it transforms your underwater experience, allowing you to focus on the wonders below the surface with confidence and connection.

Top Picks For Underwater Signal Transmitters