Best Survival Watch for Preppers (2026 Guide)
A survival watch gives you a compass, barometer, altimeter, and GPS without draining a phone battery. This guide covers every feature that matters — ABC sensors, solar charging, water resistance, MIL-SPEC durability — and specific picks at every budget from G-Shock to Garmin.
Best Survival Watch for Preppers (2026 Guide)
Your phone has a compass, a barometer, a GPS receiver, and a fitness tracker. It also has a battery that dies after 8 to 12 hours of active use, a screen that shatters, a case that is not remotely waterproof, and a dependency on cell service for half its advertised features.
A survival watch does none of the impressive things a phone does. It does a much shorter list of things — tell time, display compass bearing, show barometric pressure, read altitude, and in some cases pinpoint your GPS coordinates — and it does all of them regardless of cell service, battery anxiety, or whether you dropped it in a creek.
That is the argument for a dedicated survival watch. Not that it replaces a phone. It is that in the specific situations where you are most likely to need it, your phone has already become a liability.
This guide covers every spec that matters: ABC sensors, water resistance ratings, solar charging, MIL-SPEC durability, GPS capability, and the analog versus digital decision. Then we get specific about what to buy at each budget tier, from under $100 to over $300.
Why a Survival Watch Beats a Phone in an Emergency
The case against relying on a smartphone for navigation and situational awareness in emergencies is not philosophical. It is operational.
Battery drain under field conditions. GPS-enabled mapping on a smartphone — the feature most useful for navigation — consumes battery at a significant rate. Activating the screen every few minutes to check your location, combined with background apps, pushes a standard smartphone battery to empty in 4 to 6 hours. A survival watch with ABC sensors runs for months on a battery charge, or indefinitely with solar exposure.
No cell service required. Phones navigate via GPS satellites, not cell towers — so the GPS chip itself works anywhere. But weather apps, topographic maps that were not downloaded offline, and virtually every feature tied to data requires cell or Wi-Fi. A barometer on a survival watch reads current pressure directly from a sensor. A compass on a survival watch reads magnetic north from a magnetometer sensor. Neither requires a signal.
Waterproofing and shock resistance. Consumer smartphones are typically rated IPX8, meaning they survive brief submersion in fresh water under controlled conditions. A survival watch rated 20 ATM (200 meters) or MIL-SPEC handles sustained rain, river crossings, and rough handling that would end a phone’s usefulness. The G-Shock durability standard was built specifically for the shock, vibration, and temperature extremes that destroy ordinary electronics.
Wrist-mounted readout. Checking a wrist watch while moving, with gloves, in the dark, with one hand occupied, is possible. Pulling out and unlocking a phone is not always possible and never as fast. In navigation or weather-reading scenarios, the speed and accessibility of a wrist-mounted sensor matters.
Always on. A watch tells you the time, day, and — on a good survival watch — compass bearing, barometric trend, and temperature the moment you raise your wrist. There is no boot sequence, no lock screen, no battery check needed.
The Core Feature Set: What Survival Watches Must Have
Not every watch marketed as a “survival watch” or “tactical watch” has these features. Some are just chunky G-Shock clones with aggressive styling. The actual spec list is short and non-negotiable.
ABC Sensors: Altimeter, Barometer, Compass
This is the feature set that separates a genuine outdoor watch from a dressed-up timepiece.
Altimeter reads your elevation above sea level using a pressure sensor. In mountain terrain, knowing your exact elevation tells you where you are on a topographic map faster than any other method. It also warns you of elevation-related risks — altitude sickness begins to affect most people above 8,000 feet, and knowing your elevation helps you make decisions about whether to push or camp.
Barometer measures atmospheric pressure over time and displays pressure trend data — rising, stable, or falling. Falling pressure indicates an incoming weather system. A rapid pressure drop — more than 4 millibars per hour — is a reliable indicator of severe weather approaching within hours. In the field, watching your barometer trend for 6 to 12 hours provides meaningful weather prediction without any cell service or internet dependency. This is one of the most practically useful features on any survival watch.
Compass is self-explanatory for navigation, but the electronic compass on an ABC watch has one advantage over a traditional liquid-filled compass: it cannot be knocked out of calibration by impact and does not require you to hold the watch level for a reading the way some magnetic compasses do. Many ABC watches also display compass bearing continuously while you walk, eliminating the stop-and-check routine. Pair your watch compass with the skill of how a compass works to use it confidently.
Together, these three sensors give you elevation, weather prediction, and heading from the same device on your wrist. No phone required. No separate gear to pack.
Solar Charging and Battery Life
A survival watch with a dead battery is an overpriced fashion accessory.
Solar charging is the closest thing to a perpetual power source a consumer watch can have. Casio’s Tough Solar system (used in the G-Shock Rangeman, Pathfinder, and Pro Trek lines) can maintain full charge in conditions as low as indoor artificial lighting. Direct sunlight charges the battery faster than a day of normal outdoor wear depletes it. In practical terms: wear the watch daily and you may never plug it in.
Non-solar ABC watches typically claim 1 to 2 year battery life on a coin cell — but that estimate assumes sensor functions are used sparingly. If you are actively using the compass, altimeter, and barometer during a multi-day emergency, that 2-year battery collapses to a fraction of its rated life.
Battery life in GPS watches is even more limited. Continuous GPS tracking drains most smartwatch batteries in 14 to 40 hours depending on the watch. The Garmin Instinct 2 Solar is an exception — with significant solar exposure, it can maintain GPS battery indefinitely. But for most GPS-enabled watches, GPS mode is a feature you turn on for specific navigation sessions, not something you leave running continuously.
For a watch that functions as a constant sensor platform rather than an occasional navigation tool, solar ABC watches are the practical choice. For route-finding and navigation where GPS accuracy matters, a GPS watch is worth the battery trade-off.
Water Resistance Ratings
Watch water resistance ratings follow a standardized scale. Understanding the actual meaning of each rating prevents expensive damage.
3 ATM (30 meters): Splash resistant. Rain and hand-washing. Not suitable for swimming or submersion.
5 ATM (50 meters): Suitable for swimming. Not suitable for diving, fast-moving water, or sustained submersion.
10 ATM (100 meters): Suitable for swimming, snorkeling, and water sports. The minimum rating for a watch that might see field use in varied weather, river crossings, or sustained rain. The Casio G-Shock GW-9400 Rangeman is rated 20 ATM.
20 ATM (200 meters): Full recreational diving standard. Survives submersion, fast water, and hard water impact. This rating, not 3 ATM or 5 ATM, is what a serious survival watch should carry.
200m ISO dive rating: The highest consumer standard, certified for actual scuba and dive use. Watches at this rating (like the G-Shock Frogman) include ISO 6425 certification that verifies performance at depth with mechanical testing, not just ATM designations.
The ATM rating reflects static pressure tolerance, not dynamic pressure. Diving into water, cannonball style, creates pressure spikes well above static ratings. A 10 ATM watch handles casual swimming comfortably; a 20 ATM watch handles everything short of serious scuba diving.
For survival use: 10 ATM minimum, 20 ATM preferred.
MIL-SPEC Durability
The US military’s MIL-STD-810 testing protocol covers environmental extremes: shock, vibration, temperature range, humidity, altitude, salt spray, and sand and dust resistance. A watch that meets MIL-STD-810 has been tested against all of these, not just marketing copywriters’ claims.
The Casio G-Shock line was developed around a specific design brief: survive a 10-meter drop onto concrete, function at depth in water, and withstand temperature extremes. The resulting triple-layer structure — soft inner urethane core, semi-rigid middle layer, hard outer resin shell — is why G-Shock watches are genuinely shock-resistant rather than just marketed that way.
Temperature range matters in cold-weather scenarios. A watch rated to minus 20 degrees Celsius handles most continental winter conditions. The Garmin Instinct 2 is rated from minus 20 to 60 degrees Celsius. Some Casio Protrek models extend to minus 10 degrees Celsius. Check the operating temperature range on any watch you intend to use in mountain or cold-weather terrain.
G-Shock vs. Smartwatch: The Reliability Argument
The most common question in prepper communities about watches is whether a GPS smartwatch — Garmin Instinct, Apple Watch Ultra, Suunto 9 — makes a dedicated ABC watch like the G-Shock Rangeman obsolete.
The honest answer is that they solve different problems, and the question of which one to own first has a clear answer.
The smartwatch case:
A GPS-enabled watch provides turn-by-turn navigation, satellite mapping overlays, waypoint recording, and route tracking. These are genuinely powerful features that an ABC watch cannot replicate. The Garmin Instinct 2 Solar adds solar charging that extends battery life significantly. If you are planning navigation in unfamiliar wilderness terrain, GPS waypointing is a legitimate capability advantage.
The G-Shock case:
A G-Shock Rangeman costs around $200. It has solar charging. It has ABC sensors. It has 20 ATM water resistance. It meets MIL-STD-810G. It has been tested in every hostile environment on earth by military personnel, SAR teams, and outdoor professionals for decades. It does not need to be charged. It does not have software that requires updates. The battery in the charging reserve will hold charge for years even if the watch never sees sunlight.
The reliability argument is not about which watch has more features. It is about which watch can be trusted to function after two weeks in the field without deliberate charging management, after being dropped on a rock, after a river crossing, after a cold night at high altitude. The G-Shock has a track record in those conditions that no smartwatch has yet accumulated.
The practical recommendation:
Own the G-Shock Rangeman first. Learn to navigate with ABC sensors and a topographic map. Understand how to read a topographic map so your compass and altimeter readings translate into actual position data. Then, if your scenarios regularly involve wilderness navigation where GPS tracking adds genuine value, add a Garmin Instinct 2 Solar as a second tool.
Do not make a GPS smartwatch your only survival watch. Its battery dependency makes it a conditional tool. A G-Shock is an unconditional tool.
Solar-Powered Watches for Survival
Solar charging is the feature most preppers should prioritize above GPS capability. Here are the two most relevant solar ABC platforms.
Casio G-Shock Rangeman GW-9400
The GW-9400 is the G-Shock built specifically for survival and field use. It combines the G-Shock shock-resistance structure with a full ABC sensor suite, Casio’s Tough Solar system, and Multi-Band 6 atomic timekeeping.
Multi-Band 6 syncs with radio time signals in six zones covering North America, Europe, Japan, and China. When signal is available, the watch corrects itself to atomic time accuracy automatically — typically overnight. When no signal is available, the watch’s internal quartz movement runs independently.
The solar panel covers the entire dial. In direct outdoor light, a few hours of sun provides enough power for months of regular use. The battery reserve holds charge for 6 months in the dark with normal feature use and up to 23 months in power-save mode.
ABC sensors include a one-button activation sequence: one press for altimeter, hold for barometer, another press for compass. The display is large and readable. The altimeter range covers from 700 meters below sea level (for coastal and below-sea-level terrain) to 10,000 meters — well above any terrain a non-mountaineer will encounter.
At roughly $200, this is the best combination of proven reliability, solar independence, and full ABC feature set at a non-premium price.
Casio Pathfinder / Pro Trek PAW-1300
The Pro Trek line takes the same Tough Solar and ABC sensor platform from the G-Shock Rangeman and packages it in a slightly more refined case with better display readability and a thermometer sensor added in some models.
The PAW-1300 adds a step-count sensor and a slightly slimmer profile than the Rangeman. It sacrifices some of the G-Shock’s extreme shock resistance for a more wearable daily form factor. Water resistance is 10 ATM rather than the Rangeman’s 20 ATM — adequate for field use but not the maximum available.
The Pro Trek is the right choice for preppers who want solar ABC capability and plan to wear the watch daily in urban and suburban contexts where G-Shock bulk is inconvenient. It functions identically to the Rangeman for weather reading, navigation, and altitude tracking. It is simply less armored.
ABC Watches: Navigation and Weather Prediction
The altimeter and barometer on a survival watch are not gimicky additions. They are the two sensor functions that most directly affect decision-making in the field.
Using the barometer for weather prediction:
Barometric pressure trends are more accurate indicators of short-term weather than most consumer forecast apps. The watch measures actual local pressure, not modeled regional data. A falling trend — pressure dropping 2 to 4 millibars per hour — indicates frontal passage within 12 to 24 hours. A rapid drop of more than 4 millibars per hour signals severe weather arriving in 4 to 8 hours. A rising trend indicates clearing conditions following a front.
Check the barometer every 2 to 3 hours during field time. Write the readings on your hand or memorize the trend. This simple discipline gives you weather warning that no app provides in areas without cell service.
Using the altimeter for navigation:
Elevation fixes your position on a topographic map to a single contour line. Combined with a compass bearing to a known landmark, elevation narrows your possible position to a single point. In poor visibility — fog, heavy forest, after dark — knowing you are at 7,400 feet on the northeast-facing slope of a ridge is often enough to navigate back to camp without GPS.
Note: most ABC watch altimeters derive altitude from barometric pressure, not GPS. This means altitude readings drift when barometric pressure changes due to weather. Recalibrate your altimeter at every known-elevation landmark (a trailhead sign, a prominent saddle, a benchmark) to correct for pressure-induced drift.
GPS Watches for Navigation
GPS watches for survival are primarily useful for two functions: breadcrumb trail recording and coordinate-based navigation.
Breadcrumb trail recording logs your path automatically, allowing you to retrace your route exactly even in featureless terrain. This is the GPS feature with the clearest survival value — if you become disoriented, following your breadcrumb trail back to your starting point requires no navigation skill whatsoever.
Coordinate-based navigation lets you enter a destination as GPS coordinates and follow a bearing to it. Combined with a downloaded topographic map, this provides the navigation capability closest to a dedicated GPS unit.
The Garmin Instinct 2 Solar is the GPS watch with the best case for survival use. Solar charging extends battery life beyond any other GPS watch at its price point. In favorable sunlight, the Instinct 2 Solar can run indefinitely. In GPS mode specifically, solar extends tracking time to 48 hours or more under good light conditions versus roughly 30 hours on battery alone.
The Instinct 2 Solar also meets MIL-STD-810 testing requirements and is rated 10 ATM water resistant. It has ABC sensors. It is the GPS watch a prepper should buy if GPS tracking is the priority feature.
The Garmin Fenix 7 Solar and Suunto 9 Baro are the alternatives at higher price points, adding larger displays, more detailed mapping, and finer altimeter calibration. For preppers who need advanced navigation capability and have the budget, either is a meaningful upgrade over the Instinct 2.
Analog vs. Digital Survival Watches
The analog versus digital debate for survival watches has a practical resolution.
Digital watches (G-Shock, Garmin Instinct, Suunto) can display ABC sensor data directly on the dial, allow menu-driven feature access, and update displays in real time. For survival watches with electronic sensors, digital readout is the correct format. You cannot display live barometric trend data on an analog dial.
Analog watches offer one survival-specific advantage: a sun compass method that requires an analog dial and cannot be replicated with digital.
The Sun Compass Method
An analog watch can function as a compass in the northern hemisphere when the sun is visible. The method:
- Hold the watch horizontal and point the hour hand directly at the sun.
- Find the midpoint of the arc between the hour hand and the 12 o’clock position (or the 1 o’clock position during daylight saving time).
- That midpoint points true south.
- True north is the opposite direction.
This method is accurate within roughly 15 to 30 degrees — good enough for general direction finding when a compass is unavailable or dead. It works anytime the sun is visible and you know the approximate time. Learn it. It requires no batteries.
For preppers who want an analog watch as a sun-compass backup, the Casio G-Shock GA-2100 provides the G-Shock shock and water resistance in an analog-digital hybrid format. The hands are analog; the display panel handles date, alarm, and world time.
The practical kit: a digital ABC watch as your primary (G-Shock Rangeman or similar) plus an analog backup with solar charging or a simple quartz battery for the sun compass method when you want it.
Water Resistance Ratings: What the Numbers Mean in Practice
| Rating | Depth Claim | Actual Suitable Use |
|---|---|---|
| 3 ATM | 30 meters | Rain, splashes, handwashing |
| 5 ATM | 50 meters | Swimming in shallow water |
| 10 ATM | 100 meters | Swimming, snorkeling, water sports |
| 20 ATM | 200 meters | Recreational diving, fast-moving water |
| 200m ISO 6425 | Dive certified | Scuba diving, professional dive use |
For survival field use: 10 ATM is the minimum, 20 ATM is the standard you should aim for. Rain, stream crossings, falling into water, and sustained wet conditions all fall comfortably within a 20 ATM rating. The G-Shock Rangeman’s 20 ATM rating means you can treat it like it is waterproof for any realistic field scenario.
Note that water resistance degrades over time as seals age and as a watch experiences impacts. A watch rated 20 ATM at purchase may perform lower after years without a service. For watches you depend on in the field, have the seals tested or replaced every 2 to 3 years if you subject them to regular water immersion.
MIL-SPEC and Durability Standards
MIL-STD-810 is the US military standard for environmental engineering. It specifies testing protocols across 28 test methods covering shock, vibration, temperature extreme (hot and cold), temperature shock, altitude, humidity, rain, salt fog, sand and dust, and explosive atmosphere, among others.
A watch that claims MIL-STD-810G or MIL-STD-810H compliance has been tested against the subset of those methods relevant to timepieces. The specific methods vary by manufacturer — there is no single universal MIL-STD-810 watch test. Read the spec sheet to understand which tests were actually performed.
Casio G-Shock watches are tested per their own internal standard that derives from MIL-STD-810, including:
- 10-meter drop onto concrete
- Temperature range from minus 20 to 60 degrees Celsius
- 20 ATM water resistance
The Garmin Instinct 2 claims MIL-STD-810 compliance covering shock, vibration, altitude, humidity, temperature, and thermal shock. It does not carry the 20 ATM water resistance of the G-Shock.
For most preppers, the practical meaning of MIL-SPEC is: this watch was designed by people who expected it to be dropped, submerged, exposed to temperature extremes, and generally treated roughly. That design intent is embedded in every structural decision rather than an afterthought.
Best Survival Watches by Budget Tier
Under $100: Casio G-Shock GW-2310 or GW-M5610
At under $100, you cannot get an ABC sensor suite in a G-Shock. What you can get is the shock resistance, Tough Solar charging, Multi-Band 6 atomic timekeeping, and 20 ATM water resistance.
The GW-M5610 is the benchmark entry-level survival watch. It is small by G-Shock standards, uses a resin band, and provides the core G-Shock reliability platform at around $75 to $90. It does not have a compass, altimeter, or barometer. It has the power system and durability platform that makes G-Shock watches trustworthy, and it tells exact time indefinitely without ever needing to be charged.
The GW-2310 adds a world time display and is slightly larger. Both are legitimate entry-level survival watches in the sense that they are rugged, solar-powered, and shock-resistant.
Who buys this tier: Preppers who want a reliable, no-maintenance timepiece as a phone backup and plan to add a dedicated ABC watch later. Also an appropriate choice for stocking in a vehicle kit, bug-out bag, or cache where a watch may sit unused for years and still need to function.
$100 to $300: Casio G-Shock Rangeman GW-9400
The Rangeman at roughly $180 to $220 is the sweet spot of the entire market. Full ABC sensor suite. Tough Solar. 20 ATM. MIL-STD-810G. At this price, it beats or matches watches costing two to three times as much on the features that matter most for survival use.
The ABC sensor activation is single-handed: one button cycles between altimeter, barometer, and compass modes. The compass can be set to display bearing continuously. The barometer graph shows 26-hour pressure history. The altimeter records up to 40 ascent and descent logs. These are not toy implementations.
A small note on the display: the Rangeman’s five-button layout and dense display can feel cluttered until you learn the menu logic. Spend one evening with the manual — not because it is complex, but because knowing exactly how to activate each function without fumbling in poor light conditions matters.
Who buys this tier: Most preppers. This is the watch this guide recommends first.
Over $300: Garmin Instinct 2 Solar and Suunto Core All Black
Garmin Instinct 2 Solar (around $350 to $450)
The Instinct 2 Solar adds GPS tracking, multi-GNSS satellite support (GPS plus GLONASS plus Galileo), heart rate monitoring, activity tracking, Garmin’s TrackBack navigation feature, and downloadable terrain maps to the ABC sensor platform. Solar charging with the Instinct 2 Solar’s larger panel extends GPS battery life well beyond any competing GPS watch.
MIL-STD-810 rated. 10 ATM water resistant. Rated from minus 20 to 60 degrees Celsius.
The Instinct 2 Solar is the correct GPS survival watch if you want one device that does everything. Its limitation remains battery management under continuous GPS use — plan for daily solar exposure if you want GPS tracking to run continuously.
Suunto Core All Black (around $200 to $280)
The Suunto Core is the dedicated ABC watch alternative to the Rangeman for preppers who want a slimmer case and slightly more refined display. It adds a depth alarm and a storm alert function (automatic alarm when barometric pressure drops by more than 4 millibars per hour) that the Rangeman lacks as a single-press feature.
The storm alert alone is worth noting: the watch sounds an alarm when pressure drops fast enough to indicate incoming severe weather, without you needing to check the barometer graph manually. In high-distraction field conditions, that automated warning is genuinely useful.
Battery life on the Suunto Core runs 12 months on a standard CR2032 coin cell. No solar charging. This is the one significant disadvantage versus the Rangeman — you will need to replace the battery periodically, and if it dies in the field without a spare, you have a compass and altimeter that do not work.
Building Your Watch Kit
If you are starting from zero:
Step 1 — G-Shock GW-M5610 (around $80): A solar, shock-resistant, atomically accurate timepiece that never needs charging. This is your baseline redundancy if a phone battery dies and you need to know what time it is.
Step 2 — G-Shock Rangeman GW-9400 (around $200): Add this when you are ready to use a barometer for weather prediction and a compass and altimeter for navigation. This is where most preppers should stop and invest time in actually using the sensors.
Step 3 — Garmin Instinct 2 Solar (around $350) or Suunto 9 Baro (around $400+): Add a GPS watch when your scenarios involve wilderness navigation in unfamiliar terrain, route recording, or coordinate-based navigation that an ABC watch and topographic map alone cannot provide.
Learn the sun compass method regardless of which watch you carry. Practice reading your barometer before relying on it in the field. A watch with sensors you do not know how to use is just a heavy wrist accessory.
Frequently Asked Questions
What features should a survival watch have?
A survival watch should have ABC sensors (altimeter, barometer, compass), water resistance of at least 10 ATM, shock resistance, and a power source that does not depend on daily charging. Solar charging with a rechargeable battery backup is the gold standard. GPS adds navigation capability but significantly increases battery drain. For most preppers, an ABC watch with solar charging — like the Casio G-Shock Rangeman — covers all critical bases without the GPS battery penalty.
Is the Casio G-Shock good for survival?
Yes. The G-Shock line, and the Rangeman model specifically, is one of the most field-proven survival watches available. The GW-9400 Rangeman combines solar charging, ABC sensors (altimeter, barometer, compass), 20 ATM water resistance, and MIL-SPEC shock resistance in a watch that costs around $200. It has been used by military personnel, search and rescue teams, and serious preppers for years. The main trade-off versus a GPS watch is that it lacks turn-by-turn navigation — but it never needs to be plugged in.
What does 20 ATM water resistance mean?
ATM stands for atmospheres of pressure. 20 ATM indicates the watch was tested to withstand pressure equivalent to 200 meters of water depth under static conditions. In practical terms, a 20 ATM watch handles river crossings, sustained rain, swimming, snorkeling, and water sports without damage. It is the water resistance rating a survival watch should carry. Ratings below 10 ATM should be considered splash-resistant at most, not field-suitable.
What is an ABC watch?
ABC stands for altimeter, barometer, compass. An ABC watch has electronic sensors for all three functions built into the watch case. The altimeter reads elevation using a pressure sensor. The barometer reads atmospheric pressure and tracks trends over time to indicate incoming weather. The compass reads magnetic north using a magnetometer. Together, these three sensors provide the navigation and weather data most relevant to field survival without any cell service or external device.
Do I need GPS in a survival watch?
Not as your only watch. GPS adds genuine capability for breadcrumb trail recording and coordinate-based navigation but requires battery management that an ABC solar watch does not. The correct approach for most preppers is an ABC solar watch as primary — the G-Shock Rangeman — and a GPS watch as a secondary tool if your scenarios involve regular wilderness navigation in unfamiliar terrain. A good topographic map and the skills to use your ABC sensors cover most navigation needs without GPS dependency.
Frequently Asked Questions
What features should a survival watch have?
A survival watch should have ABC sensors (altimeter, barometer, compass), water resistance of at least 10 ATM, shock resistance, and a power source that does not depend on daily charging. Solar charging with a rechargeable battery backup is the gold standard. GPS adds navigation capability but significantly increases battery drain. For most preppers, an ABC watch with solar charging — like the Casio G-Shock Rangeman — covers all critical bases without the GPS battery penalty.
Is the Casio G-Shock good for survival?
Yes. The G-Shock line, and the Rangeman model specifically, is one of the most field-proven survival watches available. The GW-9400 Rangeman combines solar charging, ABC sensors (altimeter, barometer, compass), 20 ATM water resistance, and MIL-SPEC shock resistance in a watch that costs around $200. It has been used by military personnel, search and rescue teams, and serious preppers for years. The main trade-off versus a GPS watch is that it lacks turn-by-turn navigation — but it never needs to be plugged in.