Garmin MARQ Gen 3 Launches as Polar Files H12

Garmin launched the third-generation MARQ collection on 13 October 2026, putting its connected Fenix 9-era platform into a 47mm Grade 5 titanium watch with a 1.4-inch AMOLED display, sapphire glass and 128GB of storage. Six editions run from the $2,500 MARQ Athlete to $3,100 for the Aviator, Commander and Diver. The big functional hook is inReach: every MARQ Gen 3 can make voice calls over LTE and send messages or SOS through LTE or satellite without a phone.

Premium hardware, practical endurance tools

This is more than jewellery for Garmin loyalists. The whole range gets worldwide TopoActive maps, address search on the watch, ClimbPro without a loaded course, a flashlight, speaker and microphone, ECG app, training readiness and Garmin’s current Fenix 9 training software. Athletes also get running tolerance, grade-adjusted pace, stamina tracking and rucking workouts. Running Economy and Step Speed Loss require the HRM 600 strap, so they are not standalone watch metrics.

Battery estimates are the same across the collection: up to 18 days in smartwatch mode, or 7 days with the display always on. For training, Garmin rates normal activity mode at up to 32 hours and max-accuracy mode at up to 26 hours. Those figures become much more relevant for ultras and long rides once LiveTrack enters the picture: Garmin rates normal activity with LTE LiveTrack at up to 16 hours. We would plan around that lower number if family tracking matters on race day.

Polar’s likely strap successor and sensor ideas on paper

The other endurance-relevant signal this week is quieter. Polar filed a European trademark application for H12 on 12 October 2026. The5kRunner sees the name as a likely successor to the H10, with the H9 remaining Polar’s lower-cost strap line. Nothing in the filing confirms features, so updated connectivity and onboard memory remain speculation. Still, this is worth watching for runners, cyclists and triathletes who want chest-strap heart rate. A chest strap reads the heart’s electrical impulses through ECG, which is why it remains the clean reference for hard intervals and power-meter-paired sessions.

Patent activity offers direction, not product announcements. Oura received a patent describing blood-pressure estimates from morphological features in optical pulse waveforms, while another combines optical blood-oxygen sensing with sleep position for positional sleep-apnoea detection. These are PPG and SpO2 concepts based on light and blood-volume signals, not ECG measurements. Apple’s granted strap patent describes laser-light sensing of movement from tendons, blood vessels or muscles beneath the band, potentially useful for touch-free control and pulse sensing. For recovery-focused athletes, these ideas fit the broader push toward better context around sleep and load, a theme we explored in our look at [Apple Watch recovery scoring with delayed-effect testing](/en/articles/correlate-app-apple-watch-recovery-scores-with-delayed-effect-testing-2026-09-05).

What is missing? The MARQ’s phone-free functions need an active inReach plan after a 30-day trial, starting at $9.99 per month, and LTE coverage is not universal. Satellite messages and check-ins can cost extra or require a higher plan. The editions also share the same core watch, meaning the jump in price often buys a strap, bezel treatment or specialist tools rather than better training metrics. And Polar H12 is still only a name on an application, while the Apple and Oura work is only patented technology.

Our verdict: MARQ Gen 3 is for the athlete who genuinely wants inReach safety, global mapping and premium materials in one Garmin, not for someone chasing a new training-data advantage over the Fenix 9 platform. For everyone else, the Polar H12 filing is the more interesting endurance story to keep on the radar.