Garmin Descent G1 Dive Watch

The Garmin Descent G1 is the dive computer you wear every day and also happens to be excellent underwater, bridging the gap between dedicated dive instruments and modern smartwatches better than anything else at its price.

Garmin entered the dive computer market with the original Descent Mk1 and has steadily expanded the range. The G1 sits at the accessible end, using the rugged Instinct-series watch platform rather than the premium AMOLED screens of the Mk3 series. At $599, it costs less than many dedicated wrist-mount dive computers while offering GPS, multisport tracking, smartwatch notifications, and dive modes covering air, nitrox, trimix, CCR, and gauge. For Australian divers who want a single device for diving, hiking to remote shore entries, and daily fitness tracking, the G1 makes a compelling case.

## Overview

The G1 runs Garmin's proprietary Bühlmann-derived algorithm with gradient factors, giving experienced divers the ability to adjust conservatism to suit their diving style. It supports multiple gas switching, which means it can handle anything from a straightforward single-tank reef dive at the Poor Knights to a multi-gas technical dive on the Lena wreck. The watch-style form factor means it sits on your wrist all day, tracking steps, heart rate, sleep, and phone notifications, then switches seamlessly into a full-featured dive computer when you hit the water. GPS surface positioning logs your entry and exit points, which is genuinely useful for shore divers trying to find that perfect entry at Clifton Gardens or relocating a mooring in open water. The monochrome MIP display is always-on and readable in direct sunlight, though it lacks the vibrant colour of the more expensive Descent Mk3i. Compared to the Suunto D5 at a similar price, the G1 offers far more above-water functionality and gas support but has a smaller, less colourful screen. Against the Shearwater Peregrine, the G1 trades underwater display clarity for the everyday smartwatch capability that the Peregrine simply does not have.

## Key Features

- GPS dive computer in a rugged watch-style form factor - Supports air, nitrox (up to 100% O2), trimix, CCR, and gauge modes - Bühlmann-derived algorithm with adjustable gradient factors - Multiple gas switching for up to 6 gases - Depth rating to 100 metres - GPS surface positioning with entry and exit logging - ABC sensors: altimeter, barometer, compass - Optical heart rate sensor with Pulse Ox - Smart notifications from paired phone - Monochrome MIP always-on display - Battery life approximately 25 days in smartwatch mode, up to 25 hours in dive mode - Logbook with Garmin Dive app integration for post-dive analysis

## The Good

- The everyday wearability is the G1's strongest asset. Unlike dedicated dive computers that live in a drawer between dive weekends, the G1 sits on your wrist all week tracking your runs, hikes, and sleep. When Saturday's dive comes around, you do not need to remember to pack a separate device — it is already on your arm. This convenience alone justifies the purchase for many divers. - Gas flexibility is exceptional at this price. Air, nitrox, trimix, and CCR support means you will not outgrow this computer as your diving progresses from recreational to technical. Many divers who start on air eventually move to nitrox or explore tec — the G1 grows with you. - GPS surface logging is genuinely useful for Australian shore diving. After a dive at Bare Island or a night dive off Blairgowrie Pier, you can review your exact entry and exit points on a map. Over time, this builds a personal database of dive sites that is far more precise than memory. - The adjustable gradient factors give experienced divers control over their decompression conservatism. You can dial in your preferred settings rather than accepting a manufacturer's fixed algorithm behaviour. This is a feature typically found on computers costing twice as much. - Battery life is outstanding. Twenty-five days in smartwatch mode means you charge it roughly once a month during non-diving periods. Even in dive mode, 25 hours covers a full week of multi-dive days without needing a charger. - The rugged construction handles the rough treatment that dive gear endures. The fibre-reinforced polymer case shrugs off impacts, and the chemically strengthened lens resists scratching from boat decks, rocks, and general adventure.

## The Bad

- The monochrome MIP display is functional but small and lacks the visual appeal of colour screens. Underwater, the data is readable but dense — there is a lot of information packed into a compact watch face. Divers coming from larger dedicated computers may find the adjustment period frustrating. - No wireless air integration at this price point. To monitor tank pressure on the G1, you need to step up to the more expensive Descent G1 Solar or Mk3 series. At $599, this is understandable but still a gap in the package. - The interface uses Garmin's five-button system, which has a learning curve. Navigating menus, setting up gases, and configuring dive parameters takes practice. The first few sessions with the manual are not optional — this is not a pick-up-and-dive computer for beginners. - The watch form factor means the screen is necessarily smaller than dedicated wrist-mount computers like the Suunto D5 or Shearwater Peregrine. In low visibility or stressful situations, a larger display is easier to read at a glance.

## Verdict

The Garmin Descent G1 is the smartest dive computer purchase for divers who want one device on their wrist for everything. It handles recreational and technical diving with equal competence, tracks your fitness and daily activity, logs GPS coordinates of your dive sites, and looks presentable enough to wear to dinner afterwards. The small monochrome screen and lack of air integration at this price are its main limitations, but for the Australian diver who hikes to shore entries, dives on weekends, and wants a single capable device rather than a drawer full of specialised gadgets, the G1 hits the sweet spot of capability and value.

Star Rating: ⭐⭐⭐⭐☆ (4.5/5)