Best Military Grade Smartwatches 2022

Noor August 14, 2022

Although military and tactical watches are meant to be worn by military and army persons, you don’t have to be in the military to reap the benefits of a tactical watch, because if you’re an adventurer or sporty person, it can come in handy because of its features.

Most military watches come with onboard GPS, accelerometer, barometer, compasses, gyro, and many other tactical features, that will be beneficial in all sorts of situations.

You can use these gadgets to set waypoints on your map and navigate without getting lost, along with communicating with the team members and checking your locations.

So, whether you want to use this specific genre of watches on patrol duty or just need it for everyday life, there are plenty of reasons why you should consider investing in one. And for that, we have reviewed the 10 best tactical and military grade smartwatches available right now.

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10 Best Military Smartwatches

10 Best Military Smartwatches

Product	Features	Price
Garmin tactix Delta	Military-grade durability Multiple positioning systems	Check Price
Suunto Traverse Alpha	ABC sensors Dual-positioning system Swimproof	Check Price
Garmin Instinct Tactical	Extremely rugged Stealth mode Projected waypoints	Check Price
Casio Men's G-Shock Move	Dual-positioning system Water resistance: 200m Solar charging	Check Price
Suunto Core Classic	Triple sensors Outdoor tracking 1+ year of battery life	Check Price
Garmin fenix 6S Pro	TOPO maps ABC sensors Swimproof	Check Price
Casio GGB100-1A3	Compass/Accelerometer Mud resistant ABC sensors	Check Price
Amazfit T-Rex Pro Smart Watch	GPS tracking 24/7 health monitoring 100+ sport modes	Check Price
Casio Men's PRO TREK Stainless Steel	Rugged watch ABC sensors LED backlight	Check Price
AVTREK Mens Outdoor Sport Tactical Survival Watches	Backlight display Sport modes Swimproof	Check Price

1. Garmin Tactix Delta

Garmin Tactix Delta is the ultimate tactical wearable, with all the features that consumers in this genre need. Whether you’re exploring the outdoors or tracking critical assets deep in headquarters, Tactix Delta is your one essential tool. Also, the combination of military-grade sensors integrated with mapping technology makes this smartwatch capable of handling even the toughest missions.

When you need to disappear without a trace, the Garmin Tactix Delta is your best companion. With its stealth mode, you can disable the wireless communication and dump your location, without anyone knowing about it.

Perfect for paratrooping, the Tactix Delta gives you a heads up for when you need to release. In other words, it’s your trusted companion that plots out your route to success and forecasts high altitude release points according to military guidelines.

When you know that your mission is going to be an all-night stakeout, stay hidden and safe with the Garmin Tactix Delta, because it’s got a screen that lets you read it at night and daytime too with just easy switching. You don’t even have to take off your night vision goggles since you can see the screen with it as well.

To keep your sensitive data private, the Garmin Tactix Delta will do anything to ensure security. With one press of a button, all your sensitive information is wiped clean along with the user information so that your mission doesn’t get compromised.

It’s no secret you need the right equipment to tackle the mission or challenge, and for that Garmin, Tactix Delta uses multiple satellites systems which makes sure you can track your locations and whereabouts more precisely.

Need help navigating your next trail or getting back to camp? Along with GPS and GLONASS satellite capabilities, Garmin Tactix Delta has loaded with ABC (Altimeter, Barometer, Compass) sensors.

The altimeter is there to make sure you never lose track of elevation, while the barometer can be used to forecast weather updates. And the 3-axis electronic compass helps you stay on course and gives the navigations at sight.

Whether you’re an adventurer or on the mission, losing track of your locations and waypoints can happen to anyone, but not if Garmin Tactix delta is on your wrist, because your path can be set and saved in it. It has a cool feature that allows you to save the coordinates of interesting locations for future use, so you don’t have to do it twice.

On the go doesn’t mean abandoning your style, which is why the Garmin Tactix Delta gives all the other functionalities as well. You can make NFC payments with your watch, get notifications when you pair it to your smartphone, listen to music with Bluetooth connectivity, and can monitor your running and cycling sessions with it as well.

Garmin Tactix delta comes with MIL-STD-810 standard durability, which ensures that this watch can go on extreme conditions and is rugged enough to withstand almost every weather.

You can customize the modes and extend the battery life as you want. But this Tactix delta can last for 21 days in smartwatch mode.

Specifications & Key features:

Color: Black
Screen size: 1.4-inch
Display: Always-on
Display Type: LCD
Military-grade durability: Yes
Stealth mode
Jumpmaster mode
Kill switch
Multiple positioning systems
Navigation sensors
NFC payment/notifications

Pros:

Durable enough to go on in extreme conditions
Perfect for military persons
Innovative tactical features
Accurate positioning and navigation system

Cons:

Quite expensive

2. Suunto Traverse Alpha

Suunto Traverse Alpha is a timepiece built with durability in mind to get you through grueling days on the hill, intense rock-climbing sessions, and more. And with its durable design and performance-minded features, this watch will have you going off of course no matter which direction life takes you.

Whether you’re mapping out a plan for the next day or going back for your leftovers, Suunto Traverse Alpha will guide you. You can save points of interest as well as find your way back with the automatic bread crumb trail and built-in GPS and GLONASS systems.

Suunto Traverse Alpha is great for when your job awaits you in the dark. A discreet built-in flashlight illuminates your surroundings, along with vibration alerts. You can also watch the screen, and check the time even if you’re wearing night-vision goggles so that you don’t have to risk anything.

Military persons always have to go through extreme circumstances, since there’s no easy way out when you’re on the mission for days, but having Suunto traverse alpha can always come in handy in these situations.

With the advanced automatic shot detection that keeps track of when and where you shoot and maps your GPS coordinates for later viewing on detailed topographical maps, this watch will not only improve your hunting skills but will be a valuable asset and a backup when you’re out there.

Traverse Alpha has some good navigation features like a digital compass to make sure you can find your way back home no matter where you are. It also includes an altimeter with a barometric pressure sensor that tracks your elevation change automatically – even on days when weather conditions might lead to inaccurate readings. On top of this, storm alerts are also there to make sure you don’t get caught up in unpleasant conditions without any heads-up.

Traverse Alpha comes with Sunrise and sunset alerts to prepare you for the day’s long haul ahead. Ideal if you enjoy outdoor hunting trips as it also features a location-based moon phase calendar with Moonrise and Moonset times– ensuring that you always know when to head out.

When paired to the compatible smartphone through Bluetooth, Suunto traverse alpha will receive the notifications of the incoming call, and other phone’s notifications on it easily.

Suunto Traverse Alpha is a rugged watch that meets military standards, built to withstand the most intense adventures, and you can take it with you while swimming or diving since it has 100m water resistance.

Suunto traverse alpha can last for 14 days in the smartwatch mode and almost 10,15 and 100 hours in GPS mode, depending upon its accuracy.

Specifications & Key features:

Color: Foliage
Case material: Glass fiber reinforced composite
Lens: Sapphire crystal
Strap material: Nylon textile
Water-resistance: 100m
Automatic shot detection
ABC sensors
Dual-positioning system
Smart notifications
Military-grade durability

Pros:

Automatic shot detection and night vision compatibility
Built-to-last
Perfect for outdoor hunting
Swimproof

Cons:

Limited built-in tracking options

3. Garmin Instinct Tactical

If you’re looking for a tactical watch that doesn’t back down in the face of harsh conditions, then Garmin Instinct Tactical can be the one for you. With a rugged design to keep up with his every adventure and protection against extreme situations, you will find this gadget both useful and stylish.

Never worry about having your GPS position revealed again because this Garmin Instinct comes up with stealth mode to hide your location, radiofrequency, and other wireless functions inactive.

No need to fight poor signal. Garmin Instinct will let you navigate with confidence, as it has a dual-format GPS positioning format, including MGRS (Military-grade reference system). You can save your waypoint, or mark your favorite spots and can check them out later on without going through the trouble of doing it again.

Garmin Instinct Tactical was built tough to withstand any onslaught. It’s got a 3-axis compass for navigation, a barometer for predicting weather changes, and an altimeter for keeping track of elevation. On top of this, it has multiple global navigation satellite systems for unbeatable accuracy even when the skies are out of view.

Built specifically for military persons, this Garmin Instinct Tactical is the ultimate tactical watch. It’s now armed with mission-specific training options, including Jumpmaster through which the paratroopers would know the release points, some other and preloaded tactical activities as well. Perfect, isn’t it?

Keep track of your heart rate, activity, and stress with the Garmin Instinct Tactical. You can monitor your heart rate whenever you want to and it will let you know if you’re feeling stressed during the day.

This military watch is just as much a tool for adventure as it is for looking good. That’s why the Garmin Instinct features built-in activity profiles that are preloaded with training tips and can monitor your swimming, running, and biking sessions very easily.

After getting connected to the compatible smartphone via bluetooth, it will receive all the notifications of an incoming call, messages, other social apps. Since it’s not a standalone smartwatch, so you’ll have to stay connected to your phone to use this feature.

Garmin Instinct is built to last as it is not only thermal and shock-resistant, but it also comes with 100m water resistance, making it perfect for swimming or light diving.

Comes with multiple battery modes, Garmin Instinct can last for 40 hours in UltraTrac mode, 14 days in smartwatch mode, and almost 16 hours in GPS mode.

Specifications & Key features:

Color: tactical Tan
Screen size: 1.27-inches
Scanner resolution: 128 x 128 pixels
Military-grade durability: Yes
Water-resistance: 100m
Stealth mode
Jumpmaster mode
Dual-positioning system
Projected waypoints
Heart rate tracking
Sport modes
Smart notifications

Pros:

Extremely rugged watch
Shock, thermal and water-resistant
Built-in activity profiles
Perfect for outdoor adventures

Cons:

Complaints about the band being uncomfortable

4. Casio Men’s G-Shock Move

The Casio G-Shock Move is the ultimate watch for fitness enthusiasts and military people. With an array of sensors, it keeps track of heart rate, distance traveled, temperature, etc. at the touch of a button. Whether you’re chasing that fitness goal or just getting out there in the wild, this smartwatch makes sure nothing slips through the cracks.

Ready to get lost in the wilderness? Not a problem with this Casio G-shock move. It comes up with a built-in GPS that tracks your movement and distance traveled while running, and it also gives you accurate time zone and date adjustments from GPS signals.

Casio G-Shock Move is an adventure watch with all the tactical functions needed to take on any challenge. This rugged outdoor timepiece has not one, but four sensors including altitude for elevation, a barometer for atmospheric pressure changes, a thermometer, and a compass for navigation.

With an optical sensor, Casio G-shock Move will monitor your heart rate in no time. There’s an LED light at the back watch of the watch which ultimately detects the blood flow and displays the heart rate on the screen.

Based on your heart rate and other factors, Casio Men’s G-Shock Move also measures your blood oxygen levels and gives a personalized unique workout plan from there. This allows you to work out more effectively and efficiently in the right direction, while still keeping track of your progress.

You’ll never miss a notification while you’re out there if you have Casio G-Shock Move. With vibration alerts, you can get simple alerts for the duration of the training and your heart rate, along with notifications of emails, etc.

With 200m water resistance, you can wear G-Shock Move for even scuba diving and it won’t get damaged at all. It is also shock resistant as well, which makes it durable for hardcore conditions.

G-shock move comes with solar charging capability so that if you don’t get time to charge on the go or if you’re on the mission for days, you can just charge it using the sunlight. Also, you can go for the manual USB charging which would take almost 2 hours to get it fully charged and it can go on for 14 hours in training mode.

Specifications & Key features::

Color: Grey
Human interface input: Buttons
Water-resistance: 200m
Dual-positioning system
ABC sensors
Heart rate tracking
Blood oxygen level monitoring
Smart notifications
Swimproof

Pros:

Accurate tracking
Health monitoring
Solar and USB battery modes

Cons:

No built-in sport modes

5. SUUNTO Core

Suunto Core is multifunctional outdoor exploration gear combined with an affordable price tag. Get ready to explore the outdoors with all the tools you need for your next adventure, packed neatly on your wrist.

The general idea of the altimeter is to know exactly how high you are and to get you the data of elevation. The Suunto Core’s highly advanced technology detects altitude changes, without any need for calibration adjustments, along with ascent and descent during the session.

Built-in barometer and weather tracking functions are also there to help you predict changing conditions and contend with fast changes in the air. And when changes are detected, Suunto core will automatically notify you of storms, so that you’d have the time to prepare for these conditions accordingly.

In the dark of night when you’re on the mission, the last thing you want is to draw unwanted attention. For those moments of stealth and efficiency, Suunto core got you covered with a red light, so low-key it won’t disrupt your night vision goggle’s settings.

SUUNTO Core comes up with dual time zones and a calendar with what times to set your alarm for. Daylight maxing ensures that this watch will help get more of your day outside thanks to a countdown for sunrise and sunset. This will eventually help you in your outdoor adventures and other military operations.

Your daily activities such as steps taken, distance traveled, and estimated calories don’t go unnoticed if you have Suunto core on your wrist. Apart from tracking daily activities, it can also monitor your favorite workout and exercises including swimming, running, cycling, hiking, and much more.

Tested against military standards (MIL-STD-810) which ensures its durability and its ability to go on in unusual conditions as well. Although it is 30m water-resistant, you can jump in the swimming pool while having it on.

You won’t have to worry about charging it for almost a year, because Suunto core lasts for 12-18 months, depending upon one’s usage.

Specifications & Key features::

Color: Black
Band Material: Silicone
Band Color: Black
Band Width: 24mm
Water-resistance: 30m
Military-grade durability
Dual time and date display
Triple sensors
Red backlight at night
Sport modes
Activity tracking

Pros:

Accurate outdoor tracking
1+ year of battery life
Affordable
Rugged and durable

Cons:

No smartphone connectivity
No on-board GPS

6. Garmin Fenix 6S Pro

Since the Garmin is known for its rugged smartwatches, this Fenix 6S Pro can be your perfect pick for military purposes. With a design that is specifically made for performance and suited to tackle any challenge in style, it aims to please with its durable stainless-steel bezel and 1.2 inches sunlight-readable display that never stops at looking good.

Garmin Fenix 6S Pro will be one of the most accurate GPS watches you’ve ever worn. Powered by 3 different satellites, it provides precise measurements for wherever your adventure takes you with course calibrations every second. It’s like having a digital backup on your wrist, all the time.

Whether you’re a military person or someone who just loves outdoor adventures, this watch is for you. Packed with topographical maps and including 2,000 ski resorts around the world, Garmin Fenix 6S Pro offers top-notch features for all of your outdoor trips.

Keep track of your heart rate, monitor your sleep, and see the blood oxygen level with Garmin Fenix 6S pro. Although it’s not intended for medical purposes, one sure can get an indication from it easily.

Garmin Fenix 6S Pro is your ultimate training watch for any adventure. Built-in sensors help tell you everything from altitude to atmospheric pressure, because of their altimeter and barometer. Along with this, the digital compass will let you know your coordinates in no time. So, no matter where you are in the world, it will always be there for you.

Forgot your wallet? Don’t worry, because you can make a contactless payment right from your wrist. After adding your card to the watch using the phone app, you can pay for your bills from the Garmin Fenix 6S pro, whenever you’re on the go.

Garmin Fenix 6S Pro has got multiple battery modes, through which it can last for 34 days in battery saver mode, 9 days in smartwatch mode, 6 hours in GPS/Music mode, and 20 days without using the GPS.

Specifications & Key features:

Color: Black
Display: 1.2-inches
Bezel: Stainless-steel
Display Type: Sunlight readable
Water-resistant: 100m
NFC payments
Dual-positioning system
TOPO maps
Heart rate tracking
Sleep/Blood oxygen level monitoring
Music player
Altimeter/Barometer/Compass
Swimproof

Pros:

Rugged design, easy-to-use display
Topographical maps for outdoor adventures
Contactless payment
Detailed health monitoring

Cons:

Average battery life in GPS mode

7. Casio GGB100-1A3 Master of G Mudmaster

Tough watches are nothing new, but Casio G-shock Mudmaster takes it to the next level. With its rugged appearance and materials, it is built to withstand the toughest conditions without fear of disaster. Since professional military and law enforcement persons have to go through unusual circumstances, you should have a watch that would be there for you at all costs, and this gadget right here has the potential for it.

We all know that Casio is best when it comes to rugged watches, but this G-shock model takes things a step further by providing a carbon core guard structure case, which ensures protection and functionality, making it a perfect shock-resistant watch.

Most of the watches would stop working when comes in contact with water, unless they’re water-resistant, but this watch can stand up to anything with its tough exterior of carbon fiber and steel. As the name suggests, Casio Master of G Mudmaster can withstand mud, rain, snowstorm blizzards, and even a shipwreck for hours at a time, you’ll stay on top of your mission no matter how wild it gets outside.

Although its ability to go on in the mud is the highlight here, it has some tactical features in it as well. Casio Mudmaster comes up with a barometer for keeping track of atmospheric pressure and changes in the weather, and an altimeter/thermometer for elevation and temperature changes.

Along with these, you can find your coordinates with its built-in compass and keep track of step count, since it has its accelerometer.

Casio Master of G can be used for light scuba diving or swimming since it has a water resistance of 200m, making it perfect for using underwater.

Casio Mudmaster can last for more than a year after which you can manually replace the battery with the new one.

Specifications & key features::

Color: Silver
Display Type: Analog
Band Material: Plastic
Band Color: Green
Water-resistance: 200m
Altimeter
Barometer
Compass/Accelerometer
Mud resistant
Shock resistant
Swimproof

Pros:

Extremely rugged
Can withstand even mud
Long-lasting battery life

Cons:

No on-board GPS
The display might be small for some people

8. Amazfit T-Rex Pro

Amazfit T-rex smartwatch has 15 military certifications, making it sturdy enough to withstand even the harshest of environments. But what sets it apart is its 1.3-inch AMOLED color screen with an always-on display so you can enjoy all your vital information at a glance.

This Amazfit T-Rex Smart Watch is more than just a usual rugged watch. The high-precision GPS tracking doubles the signal efficiency of regular satellite searches, making positioning more accurate everywhere. So, whether you’re on the move or laying low for the mission, you can track your locations anytime, anywhere.

T-Rex Pro is the perfect way to monitor your delicate heart. This smartwatch can show instant alerts for all cases of high heart rate, and it tracks HRV throughout the day, and you can get detailed insights whenever you want to.

Whether you’re a military person or not, a definite amount of sleep is very important for you to function normally, and for that T-Rex, Pro tracks your sleeping stages which includes light, deep, and REM zones as well as daytime naps as well.

Amazfit T-Rex Pro comes up whooping 100 sports modes, making it perfect for athletes, sporty persons, and adventures on any level. With workout heart rate, distance traveled, movement speed, and calorie burned in real-time monitoring for most sports modes, you can track your performance levels to help improve your athletic abilities very easily.

Along with all the smart features, it does have some tactical ones as well, such as an altimeter for measuring elevations, a barometer for predicting weather changes, and a compass for navigation.

Amazfit T-Rex Pro has 100m water-resistant which means you can jump in the swimming pool or take it with it while going for light diving, and it will withstand all of it.

With the heavy usage T-Rex, Pro would last for 9 days, or with average usage, it would go on for about 18 days, which is good battery life, to say the least.

Specifications & Key features::

Color: Black
Display: 1.3-inch AMOLED display
Weight: 60g
Water-resistant: 100m
Smart notifications
Heart rate/sleep tracking
Sport modes
GPS tracking
Blood oxygen level monitoring
Swimproof
Long battery life

Pros:

Rugged design, stylish display
Detailed health monitoring
100+ sport modes

Cons:

The display might be sensitive to extreme conditions

9. Casio Men’s Pathfinder Triple Sensor

Casio Men’s Pathfinder is perfect for the outdoorsman who’s always on the move or military persons, because of its rugged nature, and with a tough solar power feature that will never leave you without battery but will be your constant companion everywhere.

If you’re on night duty, or just wandering around in the dark, you won’t have to press any buttons to see the display, because LED Backlight with afterglow will illuminate next to nothing, even in total darkness. Never again will you have trouble viewing your timepiece when it’s dark outside or near a light source.

Casio Men’s Pathfinder comes up with triple sensors to make sure you have all the right tactical features on your wrist. A digital compass is there to make sure you can get back on the track in case of losing coordinates, barometer gives you hints about weather changes, while the altimeter comes in handy in determining elevations.

Casio Pathfinder is packed with features including World Time (48 cities), Multi Alarm, Stopwatch, and 1/100 second stopwatch, which has 3 separate measuring modes: 1^st and 2^nd place, split time, and elapsed time.

Can be worn for swimming, light snorkeling, but is not suitable for scuba diving, since the water resistance of Casio Men’s pathfinder is 100m.

Don’t worry about the charging for the next 6 months, and just enjoy all the features of this amazing outdoor watch.

Specification & Key features:

Color: Black
Water-resistance: 100m
Battery life: 6 months
Altimeter
Barometer
Compass
LED backlight
World time
Multi-alarm
Stopwatch

Pros:

Extremely good battery life
Amazingly rugged watch
Affordable

Cons:

No on-board GPS

10. AVTREK Apache – Cheap Tactical and Military Watch

Compact, practical, and accurate. Probably not as rugged as the smartwatches mentioned above, but it still is the perfect outdoor watch with its good display, comfortable nylon strap, and stainless-steel case, which makes it perfect for 24/7. The main highlight here of this watch is its price tag which comes under 80 bucks while having some good features. Amazing, right?

AVTREK Apache Men’s Outdoor watch comes up with its very own digital compass so that you can navigate through the wilderness easier and it’s highly accurate too. Although it doesn’t need calibration it’s safe to do once in a while.

The barometer is also there so that you’re on the outdoor trip, you will know exactly when to wrap it quickly in case of bad weather. Along with this it also has its weather forecast feature, which is great. And, yes, the altimeter is also there to give insights about current elevation.

Your daily step count will be monitored with it, along with different sport modes including swimming and hiking. Wear it on your wrist, and it will make sure you have all the insights about these workouts and exercises.

AVTREK Apache Men’s Outdoor watch is 50m water-resistant, so it can be used for swimming and can withstand slight intrusion of water. (Not intended for diving or snorkeling)

Specifications & Key features:

Color: Black
Water-resistance: 50m
Altimeter
Barometer
Compass
Sport modes
Pedometer
Swimproof

Pros:

Perfect for outdoor trips
Backlight display
Cheap/affordable

Cons:

Complaints about battery life

How To Choose The Best Military Grade Smartwatch?

To get the best military watch, look for the features given below.

Military-grade durability:

MIL-STD-810G is US military standard, which means that the gadget has gone through a series of tests, and it is made for rough and tough conditions. If the watch has military-grade durability, then it will be able to withstand extreme outdoor conditions.

Rugged:

Having a watch that is shockproof and scratch-resistant will always come in handy in outdoor conditions because you never know what kind of environment and whether you’ll have to face it.

Navigation tools:

The solid navigation system is very important for these military smartwatches, and for that built-in GPS/GLONASS should be there, so you can track your location in emergencies, and have a backup on your wrist all the time. Some watches have topographic maps in them as well, through which one gets a clear idea about their route.

ABC sensors:

Rugged outdoor smartwatches should have ABC sensors, which are Altimeter, Barometer, and Compass. Altimeter gives you the altitude and the distance above sea level. A barometer gives you the atmospheric pressure, through which one can identify the changes in weather. And, you can use the compass for directions, if the GPS isn’t working.

Tactical features:

Since for the soldiers every milli-second count, and for that, some watches have atomic timekeeping in it, which radiofrequency and gives the accurate time on your wrist.

Some tactical watches come up with stealth mode which stops sharing your location if not safe and disables wireless connectivity on its own. Along with this, some watches also have night vision capability through which you can see the time in the dark, and a kill-switch that wipes all the data if your location or security is compromised.

Although not every military or tactical watch will have all these features, you should go with the one whose features suit you the most.

Other features:

Apart from having these features for an outdoor smartwatch, you should also see if it has heart rate, sleep tracking, and sports modes. You will be able to keep an eye on your heart rate, will know much sleep you’re getting at night, and can always track your favorite workout and exercises as well.

Water-resistant:

Your military watch should be at least 50m water-resistant so that if you have to submerge it under the water, it won’t get damaged at all.

Battery life:

It’s good if the watch can last for 5-7 days since you’d be using it outdoors and sometimes you won’t have the time to charge it as well. So, go with the one which offers at least 5 days of battery life.

FAQ’s

Are military smartwatches any different from the regular ones?

Partially, yes. But the strength of these watches is in their versatility, and the ability to withstand extreme hardcore conditions. With a tough exterior, rugged design, and long battery life, which makes them stand up to any type of weather or terrain, these watches will keep going, unlike others.

Can tactical smartwatches have smart features?

Yes, it depends on the type of model and the company you’re going with. In general, tactical watches revolves more around sensors and having a durable design.

Does Samsung have any military watches?

Samsung does produce durable smartwatches but they’re not intended to use for military purposes because they might not work under extreme conditions.

Is there any watch that is mud-resistant?

Yes, Casio Master of G Mudmaster is mud-resistant and it can work pretty fine under it.

Conclusion

I would choose Garmin Tactix Delta over every watch, because for two reasons. Firstly it can withstand any conditions and is suitable for even normal day usage. Secondly and most importantly it has got all the tactical features you’d want in a military watch, so I’d go for that.

Although it is quite expensive so the second choice would be another Garmin model which is Garmin Instinct Tactical. This watch has some serious good tactical features which will come in handy for army/military person.