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Best Scuba Computers for Beginners

There are many different types of personal decompression computers used by divers with varying designs, prices, and features for a range of specialised underwater activities.

The information, evaluations, and customer reviews listed below will help divers (especially beginners) choose the best dive computer and why some are easier to use than others.

Which Dive Computer is Good for Novices?

For many, digital underwater computers have superseded a traditional RDP dive table (recreational dive planner).

As a consequence, buying your own computer or scuba watch is often an integral part of a personalised kit because it can track:

Bottom time
Depth
No-decompression limits

Even so, scuba divers and professional free divers will have their own preferences when it comes to dive computer style (e.g. wrist mounted or console), design (chunky or slim), and colour.

The team at Private Scuba in Thailand are always eager to test and evaluate different makes and models of scuba diving computers with a range of different functions, characteristics, and prices.

The list of best diving computers reviewed below is a helpful guide. We have not based it with any particular bias towards any specific models. Please send an email to our team of scuba professionals if you have any questions or comments.

Some of the Key Factors We Tested

Overseen by our Master Instructor, the testers based their scuba computer appraisals on the following categories and features:

Are the general ergonomics (e.g. size, shape, comfort, effectiveness, and straps) user-friendly for divers?
How easy is it to configure the settings and operate it underwater (especially while wearing diving gloves)?
Is it easy to read the display screen at the surface (e.g. in strong sunlight) and how clear and effective is the backlight data display underwater?
Before and after performing a safety-stop, how precise are the alerts, timer, surface interval data, no-fly time regulations, and recorded particulars for logging the dive?

Note: Another help guide explains some of the key features you should be looking for when buying the best scuba mask, such as a good field of vision.

Mares Sirius Dive Computer Review

In essence, the best scuba diving computer is one that combines state-of-the-art technology with elegance and reliability.

Dive computer reviews based on current coverage and user insights suggests the new Mares Sirius watch-style dive computer certainly stands up to the test.

Not only is it a good dive computer for beginners and style-conscious recreational divers, but the top-notch specifications should also suit Extended Range divers.

Mares Sirius Dive Computer Specifications

Bühlmann ZH-L16C algorithm decompression model with gradient factors and predictive multigas.
Nitrox (EAN from 21% to 99%) and trimix capable (up to five gases).
High-resolution Memory-in-Pixel (MIP) colour display.
Full tilt digital compass with bearing memory to simplify underwater navigation with stopwatch.
Hoseless tank data integration for up to five (5) transmitters.
Colour coded tank pressure reading for first sight readability.
Decompression dive planner with additional surface interval function. Bottom timer mode is available with resettable average depth levels and stopwatch function.
Tissue saturation and dive profile graph.
Smart battery management system with up to thirty (30) hours dive time per full charge (when not using the transmitter). The digital dive logbook stores one hundred (100) dives with multiple graphs.
Bluetooth connection for direct connection to a smartphone and the underwater menu means you can change certain settings during the dive.
Future deco and runaway deco alerts.
Three watch faces with two colour options (available in black or black/silver). Changeable strap for use with any wetsuit thickness and wireless charging base.

Diving Computer Reviews: User Feedback

"In my opinion, the MIP screen and backlight are a tad inferior to the AMOLED version used in the Shearwater Teric, especially when I used it for night diving."

Pro Tip: The scuba courses section contains more information about the PADI^TM Night Diving Certification with a list of benefits for becoming a night diver specialist.

SEAC Tablet Dive Computer Review

This new Computer Tablet could be a good choice for you if you're looking for air integration, multiple gas mixes, and a clear, rugged display.

Its robust features offer value for money in a solid Bluetooth‑enabled dive logging device. But, you should consider how safety‑stop alerts are displayed.

Key Features and Specifications

Air-Integrated and Multi-Gas Support: Monitors tank pressure with wireless transmitters (up to 3), compatible with Nitrox mixes up to 99% O (ideal for Enriched Nitrox diving).
Large High‑Contrast LCD and Backlight: Easy-to-read graphic display with adjustable contrast and backlight; two well-spaced buttons work even with thick neoprene diving gloves.
Bühlmann ZHL‑16C Algorithm: The scuba mode includes six (6) setpoint customisations, such as gauge mode, freediving, and a stopwatch/"off" mode.
Built‑in Logbook with Bluetooth: The device records up to 65 hours of scuba/gauge dives and 24 hours of freediving, with wireless data export via Bluetooth.
Replaceable Battery: The estimated battery life is around six hundred (600) dives over a two-year period (the battery is also user-replaceable).

Dive Computers Reviews from SEAC Customer

"The safety stop function fails to trigger until you go past twelve 12 metres (40 feet). Whereas, almost all other scuba diving computers trigger at nine (9) metres (30 feet). Even so, I like the display and the competitive price range (around 13,000 THB)."

Scubapro Galileo 3 Dive Computer Reviews

It's fair to say Scubapro is renowned for producing premium, watch-style instruments. Yet, the new Galileo 3 (G3) wrist dive computer combines further advances in diving capabilities with everyday versatility and wearability.

The standard model features a distinctive deep blue coloured bezel and the 60th anniversary dive computer comes with a red bezel and red screen accents.

Plus, you can also use the self-luminescent digits and markers to set and track dive times in Gauge mode, and the high-contrast full-colour display and backlight offer superior readability.

Scubapro Galileo G3 Wrist Dive Computer Review The titanium case means the unit is durable, super comfortable, and lightweight, weighing 99 grams (or 3.49 ounces).

Galileo (G3) Wrist Dive Computer Specs

Control buttons: Four (4)
Maximum operating depth: 300 metres (984 feet)
Gases: Eight (8)
Air integration: Yes
Algorithm features: Adaptive Algorithm, Microbubbles, Predictive Multi-Gas, PDIS
Sport mode options: Freediving, CCR, Scuba, Gauge
Connectivity: BlueTooth, USB
Memory capacity: 485MB

The Scubapro Galileo 3 (G3) Dive Computer is packaged inside a soft black case with a silicone arm strap.

It also contains an arm strap extension, USB cable, charging dongle and holder, lanyard with clip, Quick Card, and Read First Manual.

Depending on which dive and watch settings you are using, it provides up to thirty (30) hours per charge from the rechargeable lithium battery.

Dive Computers Reviews from Customers

"I think the Galileo 3 has a classic watch-style design that will hold its appeal. I really like the robust stainless build and impressive colour display."

Garmin Descent™ G2 Dive Computer Review

Choosing a dive computer is always easier after you read some indepth dive computer reviews about the different products available.

The new all-in-one watch-style Garmin Descent™ is an advanced dive computer designed for underwater exploration and for monitoring topside activities.

It has a higher price than the Descent GI Solar - a popular addition to freediving equipment accessories.

Even so, a strong proposition for buying it is the adaptability for diver development. It's one of the best dive computers on the market that is designed for recreational and technical divers. But it also features smartwatch functionality.

The full range of the Descent™ models launched by Garmin Ltd includes:

Descent G2 (price $699)
Descent Mk3i - 43 mm (price $1,399)
Descent Mk3i - 51 mm (price $1,599)
Descent X50i (price $1,499)

Descent™ G2 Dive Computer Specifications

Water Rating: Dive (100 metres)
Strap Material: Silicone
Quickfit™ Watch Band Compatible: (22 mm)
Size: 45.5 x 45.5 x 15.2 mm
Silicone band: 135-230 mm (extra long 128-373 mm)
Display Size: 30.4 mm (1.2″) diameter
Display resolution: 390 x 390 pixels
Memory/History: 4 GB
Weight: 61 grams

Key Features

Bright 1.2-inch AMOLED easy-to-read sapphire lens and leak proof buttons.
Up to ten (10) days of battery life (smartwatch mode).
Housing, bezel, and buttons made with 100% recycled ocean-bound plastics.
Supports multiple dive modes (e.g. advanced technical, freedives, pool apnea) with built-in 3-axis compass.
Stores essential dive information like a scuba log book and you can review it in the Garmin Dive™ Smartphone Application.
Contains advanced health and wellness monitoring features, including heart rate, advanced sleep monitoring, and pulse oximeter (in some countries) and more than one hundred sports apps.

Pro Tip: Besides producing one of the best PLB for diving (personal locator beacons) Garmin also sells a range of wearable technology and GPS navigation devices.

Suunto Ocean Dive Computer Review

One of the latest offerings from Suunto is a watch-size, colour screen, multi-sport computer with Global Positioning System (GPS) and free maps.

Designed and built in Finland, the Suunto Ocean All Black dive computer comes with a heart rate monitor, 95 different sports modes, extra long battery life, and an affordable price tag.

The body of this "repairable" machine is light, slender, and sporty. If you include the buttons, the Suunto Ocean is fifty two (52) millimetres across and it measures fifteen (15) millimetres from the sensor section to the top of the screen (thickness).

Suunto Ocean Dive Computer Review The body is made of glass fibre-reinforced polyamide with a stainless steel bezel. There are three different colour options:

All Black
Black and Silver
Light Cream

Suunto Ocean Dive Computer Specifications

Measurements: 49.9 x 49.9 x 13.2 millimetres (1.96 x 1.96 x 0.52 inches)
Weight: 99 grams (3.49 ounces)
Bezel material: Stainless steel
Glass material: Sapphire crystal
Case material: Glass fibre reinforced polyamide
Strap material: Silicone

Besides the USB charging cable and printed user documentation, Suunto also offers a wide range of straps, including a textile strap for everyday use as well as a long silicone strap with customisable colours.

Similar to the Suunto EON dive computers, the Ocean All Black has a three button user interface and touch screen for tapping and swiping (when out of the water).

Apart from the data shown on the display screen, the new Suunto Ocean dive computer and sports watch also has an audible and vibration alert.

Scuba Computer Reviews: Customer Comments

"Finally, Suunto has released a worthy competitor to the Garmin. As a satisfied Garmin owner... I'm impressed!"

"Did 5 dives already with the Suunto Ocean. Man, it is a great dive computer. The screen is very bright and the buttons are very accessible with 3mm gloves. Lots of info available on the screen. You can (obviously) dive with air and nitrox, but not trimix."

Pro Tip: One of the biggest selling points of the new Suunto Ocean is the rechargeable battery. According to the manufacturer, divers can get up to twenty six (26) days of battery life (in eco mode).

SEAC SCREEN Wrist Dive Computer Review

The superior features and ultramodern appearance of the Seac Screen scuba diving computer are the main reasons behind its growing popularity in the industry.

In actual fact, Scuba Diver magazine's industry standard Scuba Lab Test supports the claim by ranking it as the "Best Buy Award".

Since the initial release of the SEAC Screen towards the end of 2020, it's been seen as one of the best dive computers for absolute beginners.

Apart from being super easy to read - especially in low light conditions - the modern ergonomic design also features Nitrox mode, audible alarms, warning light violations, and dive planning.

SEAC SCREEN Dive Computer Specifications

Adjustable brightness and contrast
Automatic or manual Light Mode (backlight time from 2 to 60 seconds)
Display measurements: 4 x 4.7cm (1.57 x 1.85")
Face measurements: 6.7 x 7cm (2.64 x 2.76")
Sturdy rubber housing with long wrist strap for bulky drysuits: 36cm (14.17")
Scuba mode supports 1 or 2 mixes with O2 up to 99%)
Downloadable data via USB (item sold separately)
User replaceable CR2450 battery
Maximum Depth: 330' (100m)
2-button management of display + 3 modes of operation (scuba, gauge (with stopwatch), and free-dive)
Logbook function records up to forty (40) hours of diving in scuba/gauge mode (18 hours in free-dive mode)

SEAC SCREEN Dive Computer: User Feedback

"Even though this model appears to offer divers a deep stop function, I decided to turn it off. I just use the Dive Plan app or RDP to get the NDL for the dive."

Pro Tip: Some technical divers are buying the budget-priced SEAC SCREEN Wrist Dive Computer for use as a back-up. Still, with a price tag around $299, this may also be the best dive computer for beginners (let us know what you think).

Related Information and Help Guides

Note: The short video [12:11 minutes] presented by "Scuba Diver Magazine" contains essential advice and information for divers who are buying a first time dive computer or replacing an ageing one.