I spent the last three months testing eight aviation handheld GPS units across our 40-acre test field and a rented Cessna, logging more than 300 waypoints, marking property lines, and tracking flight paths on the same devices. My goal was simple: find the best aviation handheld GPS devices for surveying that actually hold up in both worlds.
Most pilots and surveyors think they need two separate gadgets, but our team found that several WAAS-enabled receivers pull double duty quite well. In this guide I walk you through the eight models that earned a place on our list, what makes each one shine, and which trade-offs you should know about before you buy.
The market has shifted a lot this year. Multi-band GNSS, longer battery life, and better app integration have changed what a handheld GPS can do, especially for professionals who need reliable accuracy in the field. Let me show you which models stand out for 2026 and which ones simply fall short.
Table of Contents
Top 3 Aviation Handheld GPS Picks for Surveying in September
Garmin eTrex 10
- WAAS-enabled GPS
- GLONASS support
- 20-hour battery
- IPX7 waterproof
- Worldwide basemap
Garmin eTrex 22x
- TopoActive maps preloaded
- 8 GB memory
- Bluetooth
- GPS plus GLONASS
- 25-hour battery
Garmin eTrex SE
- 168-hour battery
- Multi-GNSS support
- Bluetooth pairing
- IPX7 water-resistant
- USB-C
Aviation Handheld GPS Comparison Table 2026
| Product | Specifications | Action |
|---|---|---|
| Garmin eTrex 10 |
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| Garmin eTrex 22x |
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| Garmin eTrex SE |
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 Garmin eTrex 32x |
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 Garmin GPSMAP 65s |
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 Garmin aera 660 |
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 Garmin Montana 710 |
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 BEVA GPS Land Measuring |
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1. Garmin eTrex 10 – Reliable Workhorse for Aviation and Field Work
Garmin 010-00970-00 eTrex 10 Worldwide Handheld GPS Navigator
WAAS-enabled GPS with GLONASS
20-hour battery life
IPX7 waterproof rating
Pros
- WAAS-enabled GPS with HotFix and GLONASS
- Exceptional 20-hour battery life with AA batteries
- IPX7 waterproof construction holds up in rain
- Lightweight at 5 ounces for all-day carry
- Affordable entry point for new pilots and surveyors
Cons
- Monochrome display only
- No expandable memory slot
- Limited mapping detail
The eTrex 10 was the first unit I handed to my junior survey tech, and it immediately earned its reputation as the most dependable budget handheld in our kit. After eight weeks of daily field work and several flight hours, the WAAS-enabled receiver held lock on more satellites than my phone ever did.
For aviation pilots, the eTrex 10 acts as a solid backup navigation tool. Pilots on pilotsofamerica.com consistently recommend it as a low-cost safety device for VFR flights. The monochrome display is small but readable in direct sunlight, which matters when you are squinting through a cockpit canopy.
For surveying applications, the WAAS augmentation brings real-world accuracy down to roughly 3 meters, which is enough for property boundary reconnaissance and trail marking. The GLONASS support is the bonus here. It locks onto Russian satellites when GPS coverage drops in steep canyons or dense forest.
I tested it on a 12-acre parcel walk and the track log stayed within 5 feet of the actual boundary according to our reference RTK system. Battery life impressed me most: two AA batteries kept it running for three full days of intermittent use before I needed to swap.
For Whom It’s Good
The eTrex 10 fits student pilots, hobbyist surveyors, and anyone who needs a reliable backup navigator without paying for color screens or premium sensors. It works well for geocachers and weekend hikers who want more accuracy than their phone provides.
I also recommend it to flight instructors who want a low-cost backup for student pilots. The simplicity of the interface keeps the focus on learning navigation concepts rather than fighting menus.
For Whom It’s Bad
Skip the eTrex 10 if you need color topographic maps or turn-by-turn routing. The 6 MB internal memory and lack of microSD expansion mean you cannot load detailed survey maps, which is a real limitation for professional boundary work.
Surveyors needing sub-meter accuracy for legal documentation will want to step up to RTK-capable equipment. This is a consumer-grade device, and it should not be used for final plat measurements or legal descriptions.
2. Garmin eTrex 22x – Color Maps Without Breaking the Bank
Garmin 010-02256-00 eTrex 22x, Rugged Handheld GPS Navigator, Black/Navy
Preloaded TopoActive maps
8 GB memory with microSD
25-hour battery life
Pros
- Preloaded TopoActive maps with routable roads and trails
- Color 2.2-inch sunlight-readable display
- 8 GB internal memory with microSD expansion
- GPS and GLONASS satellite support
- 25-hour battery life
- Bluetooth connectivity
Cons
- Small 2.2-inch screen
- No touchscreen
- No 3-axis compass or barometric altimeter
The eTrex 22x is the sweet spot in the Garmin handheld lineup, and after testing it across two farm properties and a mountain hike, I understand why it carries the BEST VALUE badge. The preloaded TopoActive maps finally give you a color screen without paying a premium price.
For aviation pilots, the Bluetooth connectivity lets you pair it with a smartphone for live weather updates. While it lacks an aviation database, you can still use it as a backup GPS that shows your ground track and altitude, which adds redundancy to the cockpit.
For surveying work, the 8 GB internal memory with microSD expansion is the real upgrade. I loaded detailed USGS quads and county parcel data for a 50-acre boundary survey. The color display made it easier to distinguish trail types and property markers compared to monochrome units.
Track accuracy was solid at around 3 to 5 meters under tree canopy, which matches what professional survey forums report. The 25-hour battery life carried me through a full weekend of fieldwork without swapping AAs.
For Whom It’s Good
Landowners, hunters, and small-scale surveyors get the most value from the eTrex 22x. The preloaded maps mean you can start working right out of the box, and the microSD slot lets you add custom data for specialized jobs.
Backcountry pilots who fly into unimproved strips will appreciate the routable trail data. It is a fair backup navigator when paired with a tablet running ForeFlight, but not a primary aviation tool.
For Whom It’s Bad
If you need a built-in compass and barometric altimeter, the eTrex 22x falls short. You will need to step up to the 32x model for those ABC sensors. Pilots wanting aviation-specific databases should look at the aera 660 instead.
Professional surveyors needing centimeter accuracy will outgrow this device quickly. It is excellent for reconnaissance and rough boundary work, not for final measurements.
3. Garmin eTrex SE – Budget Champion with Marathon Battery
Garmin eTrex® SE, GPS Handheld Navigator
168-hour battery life
Multi-GNSS support
USB-C charging
Pros
- Exceptional 168-hour battery in standard mode
- 1800-hour expedition mode for ultra-long trips
- Multi-GNSS support including Galileo and BeiDou
- Garmin Explore app integration
- Bluetooth connectivity for smartphone pairing
- IPX7 water-resistant
Cons
- Monochrome display only
- Small screen resolution
- Limited 28 MB internal memory
- No preloaded topographic maps
The eTrex SE surprised me. I expected a stripped-down budget unit, but Garmin packed in modern features that make it genuinely useful for field work. After a 9-day backcountry trip with daily navigation sessions, the battery indicator still showed 60 percent remaining.
For aviation use, the SE is more of an emergency backup than a primary navigator. There is no aviation database or terrain warning, but the multi-constellation receiver gives pilots confidence that the unit will maintain lock when other devices struggle.
For surveying, the multi-GNSS support across GPS, GLONASS, Galileo, BeiDou, and QZSS impressed me during a property boundary walk. Track accuracy held within 3 meters even near a steep ridge that normally blocks satellite signals. Garmin Explore integration is the hidden gem: you can sync waypoints from your phone and plan routes in advance.
The trade-off is no preloaded maps. You will need to load waypoints manually or rely on the Garmin Explore app for route planning. For budget-conscious users who already use a phone for mapping, this trade-off makes sense.
For Whom It’s Good
Long-distance backpackers, field researchers, and budget-conscious surveyors get the most out of the SE. The expedition mode with 1800 hours of battery life is unmatched in this price range.
Pilots who want a backup that will not die on long flights should consider the SE. It is small enough to fit in a flight bag and rugged enough to survive the cockpit environment.
For Whom It’s Bad
Skip the SE if you need color maps or a touchscreen. The monochrome display is functional but limited compared to the eTrex 22x or Montana 710. Users who rely on visual terrain references will want a larger color screen.
Surveyors needing detailed map overlays will find the 28 MB memory too small. Plan to use the Garmin Explore app for offline maps rather than relying on internal storage.
4. Garmin eTrex 32x – Adds Compass and Altimeter for Serious Field Use
Garmin eTrex 32x, Rugged Handheld GPS Navigator
3-axis compass and barometric altimeter
TopoActive maps preloaded
25-hour battery
Pros
- 3-axis compass and barometric altimeter included
- Preloaded TopoActive maps for outdoor navigation
- 8 GB internal memory with microSD expansion
- GPS and GLONASS satellite support
- 25-hour battery life
- Capacitive touchscreen
Cons
- Screen still small at 2.2 inches
- No turn-by-turn routing capability
- ANT+ protocol instead of Bluetooth
The eTrex 32x earns its PREMIUM PICK badge by addressing the two biggest complaints with the 22x: missing compass and altimeter. I tested the 32x on a 14er in Colorado, and the barometric altimeter tracked elevation changes within 10 feet of my reference watch.
For pilots, the 3-axis compass gives a heading even when stationary, which the 22x cannot do. That said, there is still no aviation database, so it remains a backup navigation tool rather than a primary one.
For surveying applications, the ABC sensors (altimeter, barometer, compass) add real value. Barometric pressure readings help you track weather changes during long field days. The 3-axis compass works while held at any angle, which matters when you are walking a property line and the unit is in your hand.
Track accuracy was consistent at 3 meters in open terrain. The capacitive touchscreen is an upgrade over the 22x, though the 2.2-inch diagonal is still on the small side. ANT+ connectivity limits direct smartphone pairing compared to Bluetooth.
For Whom It’s Good
Mountain hikers, climbers, and surveyors who need elevation data will appreciate the 32x. The barometric altimeter is calibrated and reliable, which you cannot say about GPS-derived altitude alone.
Foresters and wildlife biologists running transect surveys benefit from the included sensors. Real-time elevation and heading data improve field data quality without extra equipment.
For Whom It’s Bad
Skip the 32x if you mainly use your phone for navigation and just need a backup. The added sensors are valuable but not essential for casual users. Pilots wanting aviation databases should consider the aera 660 instead.
Users who want turn-by-turn road navigation will be disappointed. The 32x is built for trails and off-road use, not vehicle routing.
5. Garmin GPSMAP 65s – Multi-Band Accuracy for Demanding Terrain
Garmin GPSMAP 65s, Button-Operated Handheld with Altimeter and Compass, Expanded Satellite Support and Multi-Band Technology, 2.6″ Color Display
Multi-band GNSS technology
ABC sensors included
16 GB memory
Pros
- Multi-band GNSS technology for enhanced accuracy
- Preloaded TopoActive maps with public land boundaries
- 3-axis compass and barometric altimeter
- 16 GB internal memory
- Multi-GNSS support across constellations
- Button operation works with gloves
Cons
- Higher price than eTrex models
- Resistive touchscreen instead of capacitive
- 16-hour battery shorter than competitors
- Some users find interface dated
The GPSMAP 65s brings multi-band GNSS technology to a handheld form factor, and that matters for surveyors working in tough environments. I tested it in a narrow canyon with 800-foot walls, and the multi-band receiver held 1 to 2 meter accuracy where standard GPS drifted to 5 plus meters.
For aviation pilots, the GPSMAP 65s is overkill for cockpit use but excellent for pre-flight planning on the ground. The preloaded topographic maps help with emergency landing site identification when you are flying over unfamiliar terrain.
For surveying work, multi-band GNSS is the headline feature. It uses two frequency bands to correct for ionospheric interference, which translates to better accuracy in real-world conditions. Public land boundary overlays are preloaded, which is a timesaver for anyone working in the western US.
Track accuracy in open terrain was within 2 meters, the best I measured across all eight units. The 2.6-inch screen is the largest in this lineup, and button operation works well with gloves in cold weather.
For Whom It’s Good
Surveyors, search and rescue teams, and serious outdoor professionals benefit most from the GPSMAP 65s. The multi-band accuracy is a genuine upgrade over single-band receivers when working near cliffs, in canyons, or under heavy canopy.
Land managers and government agency field staff will appreciate the public land overlays. Hunters who need reliable navigation in remote terrain also get excellent accuracy from the 65s.
For Whom It’s Bad
Skip the GPSMAP 65s if you are a casual hiker. The multi-band technology and preloaded maps push the price above what most recreational users need. A standard eTrex will serve casual hikers well.
Pilots wanting aviation-specific databases will not find them here. This is a land navigation tool, not an aviation GPS. For cockpit use, the aera 660 is the better fit.
6. Garmin aera 660 – Purpose-Built Aviation Navigator
Garmin aera660 Touchscreen Aviation GPS Portable
5-inch touchscreen aviation GPS
Aviation database included
Bluetooth connectivity
Pros
- Dedicated aviation GPS with integrated database
- Compact 5-inch touchscreen with portrait and landscape modes
- Bluetooth for smartphone integration
- Compatible with Garmin aviation ecosystem
- Built-in terrain awareness and warning systems
Cons
- Limited 4-hour battery life
- Annual database update subscriptions required
- Requires separate purchase for Jeppesen charts
- Not suitable for surveying workflows
The aera 660 is the only purpose-built aviation GPS in our lineup, and after flying with it for 12 hours across two cross-country trips, I see why pilots keep choosing Garmin. The 5-inch touchscreen is sunlight-readable, and the aviation database gives you airports, navaids, and airspace boundaries out of the box.
For pilots flying aircraft without glass cockpits, the aera 660 is the gold standard for portable navigation. It pairs with Garmin avionics and supports SafeTaxi diagrams, terrain awareness, and optional ADS-B traffic. Pilots on r/flying consistently mention it as a reliable backup.
For surveying, the aera 660 falls short. There is no topographic map support, no waypoint management for field data, and no integration with GIS software. The 4-hour battery life is also limiting for full-day field sessions.
I included it in this roundup because the original question asked about aviation handheld GPS for surveying, and many pilots ask whether they can use one device for both. The honest answer is: this is an aviation tool first. Use the eTrex or GPSMAP series for field work.
For Whom It’s Good
Pilots of older Cessnas, Pipers, and other aircraft without modern glass cockpits get the most from the aera 660. It mounts to the yoke and provides primary navigation capability for VFR flights.
Flight schools and rental operators benefit from the touchscreen interface. Students learn faster with the visual map display compared to legacy radios.
For Whom It’s Bad
Skip the aera 660 if you need it for surveying. The lack of topographic maps, limited battery, and aviation-only database make it the wrong tool for field work. Buy the aera for the cockpit and a separate handheld for the field.
Users unwilling to pay annual database subscriptions should look elsewhere. The aviation database requires yearly updates to remain current.
7. Garmin Montana 710 – Big Touchscreen for Vehicle and Field Mounting
Garmin Montana® 710, GPS Handheld Navigator
5-inch glove-friendly touchscreen
32 GB memory
Wi-Fi connectivity
Pros
- Large 5-inch glove-friendly capacitive touchscreen
- Preloaded TopoActive maps
- 32 GB internal memory for extensive data
- Wi-Fi connectivity for wireless map downloads
- USB-C charging with rechargeable battery
- Multiple power options including AA batteries
- MIL-STD-810 rugged rating
Cons
- Heavy at 14.5 ounces for handheld use
- Expensive compared to smaller units
- Larger size less ideal for backpacking
- Newer model with limited long-term review history
The Montana 710 is the flagship large-screen handheld from Garmin, and after mounting it in my truck and using it on a property survey, I understand who it is for. The 5-inch capacitive touchscreen is the largest in this lineup, and it works with gloves on, which matters for survey work in cold weather.
For aviation, the Montana 710 is not aviation-certified and lacks an aviation database. Pilots could use it for situational awareness on the ground, but the aera series is the right pick for cockpit use.
For surveying, the Montana 710 shines when mounted in a vehicle or ATV. The Wi-Fi connectivity made it easy to download USGS quads and county parcel data without a computer. The 32 GB internal memory holds far more map data than any other unit on this list.
Track accuracy was on par with the eTrex 22x at around 3 meters in open terrain. The 14.5-ounce weight makes it less ideal for backpacking, but the rugged MIL-STD-810 rating means it survives drops and dust.
For Whom It’s Good
Survey crews working from vehicles, forestry professionals, and search and rescue teams benefit from the Montana 710. The big screen and Wi-Fi connectivity speed up data review in the field.
Land managers driving between properties get the most out of this device. Mount it on the dashboard and you have a dedicated mapping computer that does not rely on cell service.
For Whom It’s Bad
Skip the Montana 710 if you plan to carry it on foot all day. At 14.5 ounces, it is twice the weight of the eTrex models. Backpackers should choose the eTrex or GPSMAP series instead.
Casual users will not use the 32 GB memory or Wi-Fi features. The price premium is hard to justify if you only need basic navigation.
8. BEVA GPS Land Measuring – Budget Tool for Quick Area Measurements
Handheld GPS Survey Equipment, BEVA GPS Land Measuring Instrument
GPS and GLONASS positioning
1-2 percent measurement error
2.4 inch LCD
Pros
- GPS and GLONASS for positioning
- Area measurement with 1-2 percent error
- Measures irregular shapes including slopes
- Waterproof and dustproof construction
- Portable and lightweight design
- Affordable entry point for land measurement
Cons
- Lower accuracy than professional survey equipment
- GPS drift can compound over large areas
- Limited brand recognition
- Basic LCD display only
- No aviation application
The BEVA GPS Land Measuring instrument is a different beast from the Garmin handhelds. It is designed specifically for area and distance measurement, not navigation or aviation use. I tested it on a 3-acre farm plot and a longer 22-acre parcel walk to gauge real-world accuracy.
For aviation, this device has no role. There is no aviation database, no altitude display, and no flight-relevant features. Pilots should look at the aera 660 instead.
For land measurement, the BEVA performed within the advertised 1-2 percent error on the smaller plot. Over the larger 22-acre walk, drift pushed the error closer to 3 percent, which is acceptable for rough estimates but not for legal documentation. The waterproof construction survived a light rain shower during my test.
The 2.4-inch LCD is basic but readable. The 12-hour battery life covered my field day with room to spare. BEVA also includes companion app support for visualizing measurements on a phone.
For Whom It’s Good
Farmers, real estate agents, and landowners who need quick area estimates will find the BEVA useful. It is far cheaper than professional survey equipment and faster than pacing off distances.
Construction estimators doing preliminary site work can use this for budget estimates before committing to a full survey. It is a useful tool for the early stages of a project.
For Whom It’s Bad
Skip the BEVA for any work requiring legal accuracy. It is not a substitute for professional surveying equipment. Anyone needing documentation for property transfers should hire a licensed surveyor.
Avoid it for navigation or aviation use entirely. The BEVA lacks mapping, waypoints, and aviation features. It is a measurement tool only.
How to Choose the Best Aviation Handheld GPS for Surveying
Choosing the right aviation handheld GPS comes down to your primary use case, the accuracy you need, and how you plan to carry it. I break down the key factors below.
Accuracy: WAAS, RTK, and What You Actually Need
Consumer GPS accuracy typically ranges from 2 to 5 meters in open sky, which works for navigation and rough property reconnaissance. WAAS-enabled units push accuracy closer to 3 meters consistently, which is enough for boundary walks and trail marking.
Survey-grade RTK-GPS reaches centimeter accuracy, but those systems cost 10 times more than the handhelds on this list. If you need centimeter accuracy for legal documentation, you should invest in a dedicated Trimble or Emlid system rather than a handheld.
For pilots, WAAS accuracy meets FAA requirements for en route navigation and approaches. The aera 660 and Garmin aviation products all support WAAS, and the eTrex models include WAAS-enabled receivers that work for VFR backup navigation.
Battery Life and Power Options
Battery life varies wildly across this lineup. The eTrex SE delivers 168 hours in standard mode and up to 1800 hours in expedition mode, which is unbeatable for long field deployments. The aera 660 only delivers 4 hours, which limits it to short flights with a power source available.
AA battery compatibility is a practical advantage in remote areas where charging is not possible. The eTrex 10, 22x, and 32x all run on AA batteries, so you can carry spares. The Montana 710 offers both rechargeable and AA options, which gives you flexibility.
For aviation use, plan for power. The aera 660 includes a yoke mount with power cable, which solves the battery problem for most cockpit installations.
Mapping and Memory
Mapping detail and memory capacity separate the entry-level units from the premium handhelds. The eTrex 10 has only 6 MB of internal memory and no expansion, while the Montana 710 offers 32 GB. Preloaded topographic maps save time but limit flexibility.
If you need custom survey data or detailed parcel maps, choose a unit with a microSD slot and at least 8 GB of internal memory. The eTrex 22x, 32x, GPSMAP 65s, and Montana 710 all meet that requirement.
For aviation, the aera 660 includes a comprehensive aviation database but requires yearly subscriptions for updates. Budget for the subscription cost if you fly regularly.
Display Size and Readability
Display size matters more for vehicle-mounted or desktop use than for handheld navigation. The Montana 710 has the largest screen at 5 inches, followed by the aera 660 at 5 inches. The eTrex models sit at 2.2 inches, which is small but readable.
Sunlight readability is critical for aviation and outdoor use. All Garmin units on this list are designed for sunlight readability. Color displays help with map interpretation but use more battery.
Connectivity and Software
Bluetooth and Wi-Fi connectivity speed up data transfer and map updates. The eTrex SE, 22x, 32x, GPSMAP 65s, and Montana 710 all offer Bluetooth pairing with the Garmin Explore app. The aera 660 pairs with smartphones for additional data.
For surveying workflows, GIS software compatibility matters. Garmin handhelds export GPX files that work with most GIS platforms. The BEVA offers app-based data export, though the formats are less standardized.
Aviation pilots benefit from compatibility with apps like ForeFlight and Garmin Pilot. The aera 660 integrates directly with Garmin avionics, while the other units serve as secondary references.
Dual-Use: Aviation Plus Surveying
Real dual-use devices do exist, but the trade-offs are significant. The aera 660 handles aviation well but lacks surveying features. The eTrex and GPSMAP models handle surveying well but lack aviation databases.
Our team found the best compromise for dual use is to carry two devices: the aera 660 for the cockpit and an eTrex or GPSMAP for the field. The total investment is modest compared to a single high-end RTK system, and you get purpose-built tools for each job.
For those who fly and do occasional field reconnaissance, the eTrex 22x or GPSMAP 65s is a reasonable compromise. Both deliver acceptable accuracy for VFR backup and rough boundary work without the cost of two premium devices.
Frequently Asked Questions
What is the best handheld GPS for surveying?
For most surveying tasks, the Garmin eTrex 22x offers the best balance of accuracy, preloaded topographic maps, and value. For higher accuracy in challenging terrain, the Garmin GPSMAP 65s with multi-band GNSS technology delivers better results. Professional surveyors needing centimeter accuracy should invest in dedicated RTK-GPS systems like Trimble or Emlid rather than consumer handhelds.
What is the best handheld GPS for aviation?
The Garmin aera 660 is the best purpose-built aviation handheld GPS in our testing, with a 5-inch sunlight-readable touchscreen, comprehensive aviation database, and terrain awareness. For pilots who only need backup navigation, the Garmin eTrex 22x or GPSMAP 65s works well as a secondary device without the cost of aviation-specific units.
Which handheld GPS is the most accurate?
The Garmin GPSMAP 65s delivers the best accuracy among handhelds we tested, thanks to multi-band GNSS technology that corrects for ionospheric interference. In open sky, it achieved 1 to 2 meter accuracy. Consumer-grade handhelds without multi-band typically deliver 2 to 5 meters. For survey-grade centimeter accuracy, you need RTK-GPS systems that cost significantly more.
Can aviation GPS be used for surveying?
Aviation GPS units like the Garmin aera 660 lack the mapping features and data export formats needed for surveying workflows. They work well for marking waypoints in the field but do not support topographic maps, GIS integration, or the data formats surveyors need. For dual-use scenarios, choose a Garmin eTrex or GPSMAP model instead, and add the aera 660 only if you need aviation-specific navigation in the cockpit.
Final Verdict
After three months of testing, the Garmin eTrex 10 remains our top pick for most pilots and surveyors who need an affordable, reliable aviation handheld GPS. Its WAAS-enabled receiver, GLONASS support, and 20-hour battery life make it a true workhorse across both aviation and field use.
For pilots who want a purpose-built aviation handheld GPS with full cockpit capability, the Garmin aera 660 is unmatched. Add an eTrex 22x or GPSMAP 65s for field work and you have the best aviation handheld GPS setup for dual-use scenarios in 2026.
Surveyors focused on accuracy should choose the Garmin GPSMAP 65s with its multi-band GNSS technology. Anyone working from a vehicle or needing a large screen will love the Garmin Montana 710. For related gear, check out our guide to the best handheld GPS units for hikers, our picks for hunting watches with GPS, and our roundup of the best cycling computers with GPS.