Garmin S1 Buoy with Descent Mk3i 51mm Smartwatch & T2 Descent Transceiver

SKU: GRMDS1BUOYB MFR: GRMDS1BUOYB

PACKAGE INCLUDES:

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  • 1Garmin Descent S1 Diver Communication Buoy
    Garmin Descent S1 Diver Communication Buoy
    Coming Soon
  • +
  • 2Garmin Descent Mk3i 51mm Dive Computer Smartwatch
    Garmin Descent Mk3i 51mm Dive Computer Smartwatch
  • +
  • 3Garmin Descent T2 Transceiver
    Garmin Descent T2 Transceiver
  • +

Key Features

  • Enhance your dive safety with the S1 Buoy, offering reliable surface monitoring and diver communication.
  • Experience superior underwater awareness with the Descent Mk3i 51mm smartwatch, your ultimate dive computer.
  • Stay connected with your dive team using the T2 Descent Transceiver for seamless air integration and messaging.
  • Track essential dive data like tank pressure and depth directly on your wrist for optimal performance.
  • Review your underwater adventures with detailed heatmaps and dive logs in the Garmin Dive app.
  • Enjoy extended explorations with impressive battery life, ensuring your gear lasts as long as your dive.
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Review Summary

Garmin S1 Buoy with Descent Mk3i 51mm Smartwatch & T2 Descent Transceiver Specifications

Diver Communication Buoy

Diver Communication Buoy

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  • Purpose

    Diver communication and surface monitoring buoy

  • Compatible Devices

    Up to 8 Descent T2 transceivers and select Garmin dive computers

  • Monitoring Functions

    Tank pressure, depth, distance, and diver location

  • Post-Dive Review

    Sync and review underwater heatmaps in Garmin Dive app

  • Battery Life

    Up to 15 hours per charge

  • Wireless Network

    SubWave sonar network

  • Surface Alerts

    Topside crew can send preset alerts to divers

  • Battery Info

    Required, included

  • Battery Material

    Lithium ion

  • Battery Type

    Non-universal

  • Battery Quantity

    1

T2 Transceiver

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  • Battery

    3 V CR123A lithium

  • Battery life

    Up to 100 hours

  • Thread type

    7/16" (20 UNF)

  • Normal operating temperature

    From -4 to 140 Degree F (from -20 to 60 Degree C)

  • Underwater operating temperature

    From 32 to 104 Degree F (from 0 to 40 Degree C)

  • Storage temperature

    From -22 to 158 Degree F (from -30 to 70 Degree C)

  • Wireless frequency

    2.4 GHz @ 4 dBm

  • Surface transmission range

    Up to 33' (10m) (ANT wireless technology)

  • Tank pressure transmission range

    Up to 33' (10m)

  • Dive messaging

    Up to 98' (30m); requires compatible Descent Mk3i dive computer

  • Water rating

    Dive 656' (200m)

  • Pressure rating

    300 bar (4351 psi)

  • Inspection interval

    Inspect parts before each use for damage. Replace parts as needed (aside from normal wear and tear, performance is not affected by aging.)

  • Battery Info

    Required, included

  • Battery Material

    Lithium

  • Battery Type

    CR123A

  • Battery Quantity

    1

  • Dimensions

    3.33 x 1.44 x 1.44" (84.50 x 36.52 x 36.52mm)

Dive Computer

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  • Lens Material

    Sapphire crystal

  • Bezel Material

    Diamond-like Carbon (DLC) coated titanium

  • Case Material

    Fiber-reinforced polymer with titanium rear cover

  • Battery Life (Smartwatch Mode)

    Up to 25 days (10 days always-on)

  • Display Type

    AMOLED

  • Led Flashlight

    Yes

  • Touchscreen

    Yes

  • Water Rating

    Dive (200 meters)

  • Sleep Score And Insights

    Yes

  • Training Readiness

    Yes

  • Training Status

    Yes (improved)

  • Daily Suggested Workouts

    Yes (improved)

  • Multi-Band GPS

    Yes

  • Built-In Mapping

    Yes

  • Garmin Pay

    Yes

  • Music Storage

    Yes

  • Quickfit Watch Band Compatible

    Yes (26mm)

  • Strap Material

    Silicone or DLC coated titanium

  • Leakproof Inductive Buttons

    Yes

  • Display Size

    1.4" diameter (35.56 mm)

  • Display Resolution

    454 x 454 pixels

  • Color Display

    Yes

  • Battery Life

    Smartwatch: Up to 25 days (10 days always-on)
    Battery Saver Watch Mode: Up to 31 days
    GPS Only: Up to 76 hours (56 hours always-on)
    All Satellite Systems: Up to 55 hours (43 hours always-on)

  • Battery Life (Contd.)

    All Satellite Systems + Multi-band: Up to 48 hours (38 hours always-on)
    All Satellite Systems + Music: Up to 17 hours
    Max Battery GPS: Up to 118 hours
    Expedition GPS: Up to 24 days
    Dive Mode: Up to 66 hours

  • Battery Life (Contd..)

    Dive Mode with Air Integration: Up to 40 hours

  • Charging Method

    Garmin proprietary clip charger

  • Memory/History

    32 GB

  • Time/Date

    Yes

  • GPS Time Sync

    Yes

  • Automatic Daylight Saving Time

    Yes

  • Alarm Clock

    Yes

  • Timer

    Yes

  • Stopwatch

    Yes

  • Sunrise/Sunset Times

    Yes

  • Wrist-Based Heart Rate

    Yes (Constant, Every Second)

  • Daily Resting Heart Rate

    Yes

  • Abnormal Heart Rate Alerts

    Yes (high and low)

  • Respiration Rate (24X7)

    Yes

  • Pulse Ox Blood Oxygen Saturation

    Yes

  • Fitness Age

    Yes (in app)

  • Body Battery Energy Monitor

    Yes

  • All-Day Stress

    Yes

  • Relaxation Breathing Timer

    Yes

  • Breathwork

    Yes

  • Sleep

    Yes (advanced)

  • Hydration

    Yes (in Garmin Connect)

  • Women's Health

    Yes (in Garmin Connect)

  • Health Snapshot

    Yes

  • Jet Lag Adviser

    Yes

  • GPS

    Yes

  • Glonass

    Yes

  • Galileo

    Yes

  • SatIQ Technology

    Yes

  • Garmin Elevate Wrist Heart Rate Monitor

    Yes

  • Pulse Ox Blood Oxygen Saturation Monitor

    Yes

  • Barometric Altimeter

    Yes

  • Compass

    Yes

  • Gyroscope

    Yes

  • Accelerometer

    Yes

  • Thermometer

    Yes

  • Ambient Light Sensor

    Yes

  • Depth Sensor

    Yes

  • Connectivity

    BLUETOOTH, ANT+, Wi-Fi, Subwave

  • Connect IQ

    Yes (Downloadable Watch Faces, Data Fields, Widgets And Apps)

  • On-Device Connect Iq Store

    Yes

  • Smart Notifications

    Yes

  • Text Response/Reject Phone Call w/Text

    Yes (Android Only)

  • View Images From Notifications On Watch

    Yes (Android Only)

  • Morning Report

    Yes

  • Calendar

    Yes

  • Weather Forecasts

    Yes

  • Realtime Settings Sync

    Yes With Garmin Connect Mobile

  • Battery Saver

    Yes (Customizable Low Power Watch)

  • Controls Smartphone Music

    Yes

  • Plays And Controls Watch Music

    Yes

  • Find My Phone

    Yes

  • Find My Watch

    Yes

  • Virb Remote

    Yes

  • Smart Trainer Control

    Yes

  • Pairs With Garmin Connect Mobile

    Yes

  • Smartphone Compatibility

    iPhone, Android

  • Stocks

    Yes

  • Red Shift Mode

    Yes

  • Gym

    Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing

  • Multisport

    Swimming/Running, Triathlon

  • Wellness

    Walking, Pilates, Yoga

  • Indoor Running

    Treadmill Running, Indoor Track Running, Virtual Running

  • Outdoor Running

    Running, Outdoor Track Running, Trail Running, Ultra Running

  • Outdoor Recreation

    Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery

  • Cycling

    Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX

  • Swim

    Pool Swimming, Open Water Swimming

  • On The Water

    Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Sailing Expedition, Whitewater

  • Motor Sports

    Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling

  • Racket Sports

    Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball

  • Snow & Winter

    Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing

  • Team Sports

    Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball

  • In The Ring

    Boxing, Mixed Martial Arts

  • Other Activity Profiles

    Jumpmaster, Tactical

  • Incident Detection

    Yes ( During Select Activities)

  • Incident Detection Alert

    Yes ( On Phone For Wearables)

  • Assistance

    Yes

  • Livetrack

    Yes

  • Group Livetrack

    Yes

  • Live Event Sharing

    Yes

  • Stealth Mode

    Yes

  • Night Vision Mode

    Yes

  • Dual Grid Coordinates

    Yes

  • Kill Switch

    Yes

  • Xero Locations

    Yes

  • Ballistics Solver

    Yes (unlock required)

  • Gaming Activity

    Yes

  • Gameon App Compatible

    Yes

  • Dive Activity Maximum Operating Depth

    200 meters

  • Single-Gas Mode

    Yes

  • Multi-Gas Mode

    Yes

  • Gauge Mode

    Yes

  • Apnea Mode

    Yes

  • Apnea Hunt Mode

    Yes

  • Decompression Model

    Buhlmann ZHL-16c with gradient factors

  • Nitrox Support

    Yes

  • Trimix Support

    Yes

  • Closed Circuit Rebreather (CCR)

    Yes

  • Gas Mixes

    Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses.

  • Po2

    Up to 2.0 with customizable deco PO2 setting

  • Subwave Support

    Yes

  • Air Integration

    Yes (via Subwave)

  • Number Of Transmitters Supported

    8

  • Gas Time Remaining

    Yes

  • Gas Consumption Rate

    Yes

  • Auto Start/End Dive

    Yes

  • Custom End-Dive Timeout

    Yes (20s to 10 m)

  • Safety Stop

    Yes (customizable off/3min/5min)

  • Deep Stops

    Yes (using custom gradient factors)

  • Customizable Conservatism

    Yes (low/medium/high or custom using gradient factors)

  • Dive Ascent/Descent Rate Indicator

    Yes

  • Automatic Altitude Adjustment

    Yes

  • No Fly Time

    Yes

  • Dive Planner

    Yes (basic NDL + multi-gas deco planner)

  • Tides

    Yes

  • Tides

    Yes

  • Backlight

    Yes (configurable time and intensity; auto-on at depth)

  • Automatically Saves

    Yes (Dive Entry And Exit Locations)

  • Custom Dive Data Screens

    Yes

  • Sync Dive Log To Garmin Dive Mobile App

    Yes

  • Alerts & Alarms

    Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure, gas consumption rate. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time

  • 3-Axis Dive Compass

    Yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading

  • Missed Deco Lockout

    Yes (can be disabled prior to dive with user acknowledgement)

  • Residual Tissue Loading Reset

    Yes (on the surface with user acknowledgement)

  • Surface Diver Status Widget

    Yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status)

  • Available Boating Profiles

    Boating, Sailing, Sail Racing

  • Anchor Alarm

    Yes

  • Autopilot Control

    Yes

  • Boat Data Streaming

    CIQ

  • Virtual Starting Line

    Yes

  • Countdown Timer

    Yes

  • Tack Assist Mode

    Yes

  • Built-In Barometer And Tide Tables

    Yes (downloadable tides)

  • Wearable Trolling Motor Remote

    Yes

  • Step Counter

    Yes

  • Move Alerts

    Yes (Displays On Device After A Period Of Inactivity)

  • Auto Goal

    Yes (Learns Your Activity Level And Assigns A Daily Step Goal)

  • Calories Burned

    Yes

  • Floors Climbed

    Yes

  • Distance Traveled

    Yes

  • Intensity Minutes

    Yes

  • Trueup

    Yes

  • Move Iq

    Yes

  • Garmin Connect Challenges App

    Yes (optional Connect IQ app)

  • Cardio Workouts

    Yes

  • Strength Workouts

    Yes

  • Hiit Workouts

    Yes

  • Yoga Workouts

    Yes

  • Pilates Workouts

    Yes

  • On-Screen Workout Animations

    Yes

  • On-Screen Workout Muscle Maps

    Yes

  • Automatic Rep Counting

    Yes

  • Customizable Data Pages

    Yes

  • Downloadable Training Plans

    Yes

  • Course Guidance

    Yes

  • Hr Zones

    Yes

  • Hr Alerts

    Yes

  • Hr Calories

    Yes

  • % Hr Max

    Yes

  • % Hrr

    Yes

  • Recovery Time

    Yes

  • Auto Max Hr

    Yes

  • Race Glance/Widget

    Yes

  • Hrv Status

    Yes

  • Hrv Stress Test

    Yes (with compatible accessory) (Measures Your Heart Rate Variability While Standing Still, For 3 Minutes, To Provide You With An Estimated Stress Level; The Scale Of This Is 1 To 100; Low Scores Indicate Lower Stress Levels)

  • Hr Broadcast

    Yes (Broadcasts Hr Data Over Ant+ To Paired Devices)

  • Respiration Rate (During Exercise)

    Yes (with compatible accessory)

  • GPS Speed And Distance

    Yes

  • Customizable Activity Profiles

    Yes

  • Auto Pause

    Yes

  • Interval Training

    Yes

  • Improved Interval

    Yes (Includes Open Repeats, Intervals Data Page, Rest Screen And Auto Detection)

  • Advanced Workouts

    Yes

  • Power Modes

    Yes (Customizable In-Activity Battery Settings)

  • Hrm Running Pace And Distance

    Yes

  • Auto Lap

    Yes

  • Manual Lap

    Yes

  • Rest Timer

    Yes

  • Configurable Lap Alerts

    Yes

  • Heat And Altitude Acclimation

    Yes

  • Vo2 Max (Run)

    Yes

  • Vo2 Max (Trail Run)

    Yes

  • Realtime Stamina

    Yes

  • Endurance Score

    Yes

  • Load Ratio

    Yes

  • Training Load

    Yes

  • Training Load Focus

    Yes

  • Training Effect

    Yes

  • Training Effect (Anaerobic)

    Yes

  • Primary Benefit (Training Effect Labels)

    Yes

  • Custom Alerts

    Yes

  • Audio Prompts

    Yes

  • Finish Time

    Yes

  • Virtual Partner

    Yes

  • Race An Activity

    Yes

  • Race An Activity

    Yes

  • Auto Multisport Activities

    Yes

  • Manual Multisport Activities

    Yes

  • Garmin Live Segments

    Yes

  • Strava Live Segments

    Yes

  • Round-Trip Course

    Yes Creator (Running/Cycling)

  • Trendline Popularity Routing

    Yes

  • Touch And/Or Button Lock

    Yes

  • Hot Keys

    Yes

  • Auto Scroll

    Yes

  • Activity History On Watch

    Yes

  • Physio Trueup

    Yes

  • Unified Training Status

    Yes

  • Available Run Profiles

    Running, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running, Ultra Running

  • GPS-Based Distance, Time And Pace

    Yes

  • Running Dynamics

    Yes

  • Vertical Oscillation And Ratio

    Yes

  • Ground Contact Time And Balance

    Yes

  • Stride Length (Real Time)

    Yes

  • Cadence

    Yes (Provides Real-Time Number Of Steps Per Minute)

  • Running Power

    Yes

  • Grade-Adjusted Pace

    Yes

  • Performance Condition

    Yes

  • Lactate Threshold

    Yes (with compatible accessory)

  • Pacepro Pacing Strategies

    Yes

  • Run Workouts

    Yes

  • Hill Score

    Yes

  • Trail Run Auto Climb

    Yes

  • Race Predictor

    Yes

  • Course & Weather-Specific Race Predictor

    Yes

  • Foot Pod Capable

    Yes

  • Run/Walk/Stand Detection

    Yes

  • Preloaded With 43,000 Courses Worldwide

    Yes

  • Yardage To F/M/B

    Yes (Distance To Front, Middle And Back Of Green)

  • Yardage To Layups/Doglegs

    Yes

  • Measures Shot Distance

    automatic (Calculates Exact Yardage For Shots From Anywhere On Course)

  • Digital Scorecard

    Yes

  • Custom Targets

    Yes

  • Stat Tracking

    Yes (Strokes, Putts Per Round, Greens And Fairways Hit)

  • Garmin Autoshot

    Yes

  • Full Vector Map

    Yes

  • Auto Courseview Updates

    Yes

  • Green View With Manual Pin Position

    Yes

  • Hazards And Course Targets

    Yes

  • Pinpointer

    Yes

  • Playslike Distance

    Yes

  • Touch-Targeting

    Yes (Touch Target On Display To See The Distance To Any Point)

  • Handicap Scoring

    Yes

  • Tempo Training

    Yes

  • Round Timer/Odometer

    Yes

  • Automatic Club Tracking Compatible

    Yes (Requires Accessory)

  • Wind Speed And Direction

    Yes (Requires Connection To Garmin Golf App)

  • Virtual Caddie

    Yes

  • Pairs With Garmin Golf App

    Yes

  • Tournament Legal

    Yes

  • Green Contours

    Yes (With Garmin Golf Membership)

  • Point-To-Point Navigation

    Yes

  • Bread Crumb Trail In Real Time

    Yes

  • Back To Start

    Yes

  • Tracback

    Yes

  • Ultratrac Mode

    Yes

  • Around Me Mode

    Yes

  • Reference Point

    Yes

  • Up Ahead

    Yes

  • Nextfork Navigation

    Yes

  • Elevation Profile

    Yes

  • Distance To Destination

    Yes

  • Barometric Trend Indicator w/Storm Alert

    Yes

  • Climbpro Ascent Planner

    Yes

  • Vertical Speed

    Yes

  • Total Ascent/Descent

    Yes

  • Rest Timer (Ultra Run Only)

    Yes

  • Auto Rest

    Yes

  • Future Elevation Plot

    Yes

  • Preloaded Road And Trail Maps

    Yes

  • Preloaded Ski Resort Maps

    Yes

  • Downloadable Cartography Support

    Yes

  • GPS Coordinates

    Yes

  • Sight 'N Go

    Yes

  • Area Calculation

    Yes (via Connect IQ)

  • Fish Forecast

    Yes

  • Projected Waypoint

    Yes

  • Sun And Moon Information

    Yes

  • Expedition GPS Activity

    Yes

  • Tide Glance

    Yes

  • Courses

    Yes

  • Bike Lap And Lap Maximum Power

    Yes (With Power Sensor)

  • Alerts

    Yes (Triggers Alarm When You Reach Goals Including Time, Distance, Heart Rate Or Calories)

  • Ftp (Functional Threshold Power)

    Yes (with compatible accessory)

  • Power Curve And % Ftp Workouts

    Yes

  • Cycle Map

    Yes (Routable Cycling-Specific Street Map)

  • Mtb Grit & Flow

    Yes

  • Advanced Cycling Dynamics

    Yes

  • Compatible With Vector And Rally

    Yes (Power Meters)

  • Compatible With Varia Vision

    Yes (Head-Mounted Display)

  • Compatible With Varia Radar

    Yes (Rear-Facing Radar)

  • Compatible With Varia Lights

    Yes

  • Speed And Cadence Sensor Support

    Yes (W/Sensor)

  • Power Meter Compatible

    Yes

  • Power Guide

    Yes

  • Open-Water Swim Metrics

    Yes (Distance, Pace, Stroke Count/Rate, Stroke Distance, Swim Efficiency (Swolf), Calories)

  • Pool Swim Metrics

    Yes (Lengths, Distance, Pace, Stroke Count, Swim Efficiency (Swolf), Calories)

  • Stroke Type Detection

    Yes (Freestyle, Backstroke, Breaststroke, Butterfly) (Pool Swim Only)

  • Drill Logging (Pool Swim Only)

    Yes

  • Basic Rest Timer

    Yes (Up From 0) (Pool Swim Only)

  • "Repeat On" Rest Timer (Pool Swim Only)

    Yes

  • Auto Rest (Pool Swim Only)

    Yes

  • Time And Distance Alerts

    Yes

  • Pacing Alerts (Pool Swim Only)

    Yes

  • Countdown Start (Pool Swim Only)

    Yes

  • Pool Swim Workouts

    Yes

  • Critical Swim Speed

    Yes

  • Underwater Wrist-Based Heart Rate

    Yes

  • Heart Rate From External Hrm

    Yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus) (Real-Time During Rests, Interval And Session Stats During Rests, And Automatic Heart Rate Download Post-Swim)

  • Toe-To-Toe Challenges App

    Yes (optional Connect IQ Toe-to-Toe Challenges app)

  • Battery Info

    Required, included

  • Battery Material

    Lithium-ion

  • Battery Type

    Non-Universal

  • Battery Quantity

    1

  • Dimensions

    2 x 2 x 0.64" (51 x 51 x 16.4mm)
    Fits wrists with the following circumference: Silicone band: 5.3-9" (135-230mm)
    Extra long silicone band: 135-355 mm
    Titanium bracelet: 5.3-8.6" (135-220mm)

  • Weight

    No bands: 2.74 oz (77.8g)
    silicone band: 3.72 oz (105.6g)
    titanium band: 5.85 oz (165.9g)

  • UPC Codes

    753759283520, 753759332433

About Garmin S1 Buoy with Descent Mk3i 51mm Smartwatch & T2 Descent Transceiver

- Descent S1 Diver Communication Buoy -
Discover a deeper connection with the Descent S1 diver communication buoy. When paired with up to eight Descent T2 transceivers (sold separately) and the Garmin Dive smartphone app, the buoy enables topside crew to monitor and exchange preset messages with divers wearing compatible dive computers. (Some compatible dive computers can receive, but not send, messages. Conditions such as surface, waves, chop, objects and diver position can obstruct the signal and reduce range.) Those on the surface can use the Garmin Dive app to see the diver's tank pressure, depth and distance. Surface users can also send preset messages to divers below to alert them of situations that need attention. For positional awareness, divers can track their distance and direction back to the Descent S1 buoy. Once they've surfaced, divers can also sync and review heatmaps of their underwater activity in the Garmin Dive app to gain a better picture of approximately where they were diving. Plus, with a battery life of up to 15 hours, the Descent S1 diver communication buoy can be deployed for a full day of diving before needing a recharge.


- Descent Mk3i 51mm Dive Computer Smartwatch -
Discover a deeper connection with the Descent Mk3i watch-style dive computer. It features multiple dive modes plus SubWave sonar technology for diver-to-diver communication via preset messages (available with software v.15.70 or later). The device also supports monitoring of tank pressures and depth for up to eight networked divers, when paired with the Descent T2 transceiver (sold separately). Purpose-built specifically for divers, the Descent Mk3i dive computer combines a bright 1.2" AMOLED display with scratch-resistant sapphire lens, 200-meter dive-rated case and metal leakproof inductive buttons. DiveView maps offer bathymetric depth contours and more than 4,000 dive sites to help you find where to dive and get oriented. Plus, a dive readiness tool, developed by Garmin, shows how lifestyle factors such as sleep, exercise, stress and jet lag can affect your body's overall preparedness for diving - so, ultimately, you can make better-informed dive plan decisions (data presented is intended to be a close estimation of metrics tracked).

This dive computer is designed to help maximize your preparation for the physical and mental challenges of diving. You can also reference ABC sensors with a 3-axis underwater compass as well as surface GPS capabilities to mark your entry and exit points. When you're ashore, built-in sports apps help you stay on top of your fitness, while Garmin Pay contactless payments, music storage and smart notifications keep you connected (compatible smartphone required).


- Descent T2 Transceiver -

Add Diver Communication To Tank Pressure Monitoring
Every breath, every tank, every buddy on your dive - track them all on your wrist when you pair the Descent T2 transceiver with your compatible air-integrated Descent dive computer.

Enhanced SubWave sonar technology lets you monitor up to 8 tanks when under water - viewing air pressure, depth, use rate and time remaining - for multiple types of diving. Plus, you can even communicate via preformatted messages with other networked buddies wearing their Descent Mk3i dive computers.

Dive with added confidence and situational awareness.

Deep Dive-Rated
Built to withstand the elements, the Descent T2 transceiver is dive-rated to 20 ATM (200 meters) - so you can dive deeper without worry.

Know Your Tank
Get tank pressure, air time remaining, air consumption rate and battery remaining - all sent directly to your paired air-integrated Descent dive computer.

Link Multiple Divers
See your dive buddies' tank pressures and depths at a glance. Pair up to 8 transceivers on your group's tanks with each compatible air-integrated dive computer within a range of up to 10 meters.

Diver Messaging
Exchange preformatted diver-to-diver messages with other Descent T2 transceiver-networked buddies wearing Descent Mk3i dive computers up to 30 meters away.

Easy Tank ID
A simplified pairing process using wireless area networking makes it easy to identify your buddies' names with the Descent T2 tank transceivers they're wearing.

Garmin S1 Buoy with Descent Mk3i 51mm Smartwatch & T2 Descent Transceiver Features

  • Descent S1 Diver Communication Buoy
  • Connects with up to eight Descent T2 transceivers for group diving
  • Enables topside crew to monitor diver tank pressure and depth
  • Sends and receives preset messages between surface and divers
  • Uses Garmin Dive app for real-time diver tracking
  • Divers can view distance and direction to the buoy
  • Surface alerts divers to important situations underwater
  • Sync and review dive heatmaps after surfacing
  • Works with compatible Garmin dive computers
  • Up to 15 hours battery life for all-day diving
  • Uses SubWave sonar network for diver location mapping
  • Garmin Descent Mk3i 51mm Dive Computer Smartwatch
  • Advanced, watch-style dive computer features a stunning 1.2" AMOLED display, scratch-resistant sapphire lens and stainless steel bezel
  • Dive-first design with 200-meter dive-rated case includes metal leakproof inductive buttons and multiple dive modes for recreational to technical scuba diving and freediving
  • Enhanced SubWave sonar technology provides the ability to exchange preset diver-to-diver messages up to 30 meters
  • DiveView maps offer bathymetric depth contours and more than 4,000 dive sites to help you find where to dive and get oriented
  • Dive logs automatically sync with the Garmin Dive app downloaded to your compatible smartphone
  • Descent T2 Transceiver
  • Track up to 8 tanks with air pressure, consumption, and time remaining on your wrist
  • SubWave sonar for reliable underwater communication with dive buddies
  • Monitor multiple divers' tank pressure and depth up to 10 meters away
  • Communicate with preformatted messages up to 30 meters with Descent Mk3i users
  • Dive-rated to 20 ATM (200 meters) for deep-water exploration with confidence
  • Real-time tank pressure, consumption rate, and battery life sent to your dive computer
  • Easily link up to 8 Descent T2 transceivers for group tank monitoring
  • Simplified wireless pairing process for easy buddy and tank identification
  • View your dive buddies' tank data and depth at a glance for enhanced safety
  • Stay connected and informed with every dive, no matter the depth or conditions

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Enhance your dive safety with the S1 Buoy, offering reliable surface monitoring and diver communication.
  • Experience superior underwater awareness with the Descent Mk3i 51mm smartwatch, your ultimate dive computer.
  • Stay connected with your dive team using the T2 Descent Transceiver for seamless air integration and messaging.
  • Track essential dive data like tank pressure and depth directly on your wrist for optimal performance.
  • Review your underwater adventures with detailed heatmaps and dive logs in the Garmin Dive app.
  • Enjoy extended explorations with impressive battery life, ensuring your gear lasts as long as your dive.

What's in the box:

  • Descent S1 Diver Communication Buoy
  • Descent Mk3i 51mm Dive Computer Smartwatch
  • Descent T2 Transceiver