Garmin Descent S1 Buoy – Diver Communication Buoy

Name: Garmin Descent S1 Diver Communication Buoy
Brand: Garmin
SKU: 010-02546-00
Price: 2199.99 USD
Availability: InStock

Garmin Descent S1 diver communication buoy, orange top with black base, three-quarter front view

Garmin Descent S1 buoy floating beside a dive boat with a scuba diver below the surface

Garmin Descent S1 buoy side view showing the protective base ring

Underside of the Garmin Descent S1 buoy showing the sonar transducers

Garmin Descent S1 buoy with the included tether attached

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Description

The Garmin Descent S1 Buoy links your topside crew to the divers below. Using Garmin’s SubWave sonar network, it lets the surface monitor and track up to eight divers and exchange preset messages with divers wearing a compatible Descent dive computer paired with a Descent T2 transceiver.

From the Garmin Dive app on a phone or tablet, the boat can see each networked diver’s approximate range from the buoy, their depth and tank pressure, and get automatic alerts if there’s a tank or depth issue below. Divers in turn see the distance and direction back to the buoy, so everyone knows where to surface.

The compact 2.2 lb buoy is impact-resistant, water-rated IPX8 to 10 meters and runs up to 15 hours on its rechargeable battery – a full day of diving. After the dive, networked divers can review heatmaps of where they explored in the Garmin Dive app.

Divers need a compatible Garmin Descent dive computer (such as the Descent Mk3i or Descent X50i) and a Descent T2 transceiver, sold separately. Some compatible dive computers can receive, but not send, messages. Surface conditions, waves, chop, objects and diver position can obstruct the signal and reduce range.

Descent S1 buoy
Carrying case
Charging/data clip
Tether
Documentation

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Product Features

Remote diver monitoring
Surface crew can keep track of tank pressures, depths and more for divers wearing a compatible Descent dive computer paired with a Descent T2 transceiver. Automatic alerts flag a tank or depth issue below.
Two-way messaging
Through the Garmin Dive app, topside crew can exchange preset messages with networked Descent dive computers to let divers know about a situation. The buoy also extends the range of diver-to-diver messaging.
Diver location tracking
See the approximate range to each diver in the SubWave sonar network, up to 100 meters from the buoy.
Find my buoy
Networked divers can see the distance and direction back to the S1, giving them a clear return-to-base reference and better situational awareness.
Post-dive review
After surfacing, networked divers can review heatmaps in the Garmin Dive app to see approximately where they explored.
Rugged, compact design
The 2.2 lb buoy is impact-resistant and water-rated IPX8 to 10 meters, with up to 15 hours of battery life for a full day of diving.

Is it right for you?

Who it’s for

Dive boat crews
Instructors and guides
Group dive leaders

What do divers need?

Each diver needs a compatible Descent dive computer paired with a Descent T2 transceiver (sold separately).

Descent Mk3i + Descent T2
Descent X50i + Descent T2
Garmin Dive app (topside)

Build the network

Specifications

Network

SubWave range: 328 ft / 100 m
Divers tracked: Up to 8
Surface Wi-Fi range: 197 ft / 60 m
Connectivity: Bluetooth, Wi-Fi, ANT, SubWave
Positioning: GPS, GLONASS

Buoy

Battery life: Up to 15 hr
Weight: 2.2 lb / 981 g
Dimensions (W x H): 8.0 x 5.3 in / 203 x 135 mm
Water rating: IPX8 to 33 ft / 10 m
Battery: Rechargeable lithium-ion
Charging: Clip charger, USB-C cable

Product Details

User Guide

Download User Guide →

Shipping & Returns

Free standard shipping on orders over $50
Free 2-day shipping on orders over $300
Standard Ground delivery in 3–5 business days
Most orders process within 1 business day
Free returns within 60 days — buyer covers return shipping unless it's our error
Free return shipping on exchanges

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Questions? Email info@sbaquatics.com or see our full Shipping & Returns Policy.

Frequently Asked Questions?

What do divers need to connect to the Descent S1?

A compatible Garmin Descent dive computer, such as the Descent Mk3i or Descent X50i, paired with a Descent T2 transceiver (sold separately). Some compatible dive computers can receive messages but not send them.

How many divers can the buoy track?

The SubWave sonar network supports up to eight divers.

What is the range?

Underwater, SubWave reaches up to 100 m (328 ft) line of sight from the buoy. On the surface, the buoy connects to the Garmin Dive app over Wi-Fi up to 60 m (197 ft) away. Waves, chop, objects and diver position can obstruct the signal and reduce range.

How long does the battery last?

Up to 15 hours on the internal rechargeable lithium-ion battery. It charges with the included clip charger cable, which has a USB-C connector.

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