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SEAC Action HR dive computer

Name: SEAC Action HR dive computer
Brand: SEAC
SKU: 137335909
Rating: 5 (16 reviews)

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16 Reviews

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Features of SEAC Action HR

Product description of SEAC Action HR dive computer

Description summary

Explore the depths with the SEACSUB Action HR, the ultimate wrist-mount computer for scuba and freediving. Its user-friendly interface offers three distinct modes: SCUBA, managing recreational profiles with a Bühlmann ZHL-16C algorithm for up to two nitrox mixes; GAUGE for independent control; and FREEDIVING to track depth and time. Built with an ultra-durable structure and a backlit LCD screen, it ensures safety with multiple alarms. Log up to 40 hours of dives and analyze your data with the free Dive Manager software, making the Action HR your reliable partner for every underwater adventure

If you are looking for a dive computer , we present the new ACTION HR , designed to monitor conditions under water, ideal for freedivers and professional divers.

It is an easy-to-use device, configured to measure the depth of the water with a timer that controls the athlete´s immersion time. You can also verify the management of the dive profiles for each dive and monitor the oxygen concentration.

It has a memory of forty hours of recording saved every five seconds for the Scuba mode, and eighteen hours of activity with records every two seconds for the Freediving mode.

Seac ACTION and seac ACTION HR are new wrist-mount diving computers for scuba and freediving.

Easy to use, with 3 main modes:SCUBA MODE:full management of recreational dive profiles with a Bü hlmann ZHL-16C decompression algorithm for 1 or 2 mixes(air, Nitrox, and mixes with O2 concentrations up to 99%).

GAUGE MODE:Depth gauge and stopwatch for managing your dive profiles independently.

FREEDIVING MODE:Dive/surface time, current/maximum depth.

Main features:- LOGBOOK MEMORY:SCUBA mode:40 hours with records every 5&rdquo .

- FREEDIVING mode:18 hours of activity with records every 2&rdquo .

- Safety warning:MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, NoFly time and desaturation calculations, maximumpermitted altitude warning.

- ?NDL only&rdquo Dive Planner.

- Dive Manager software for MAC/PC (requires Windows 10), available free of charge at Seacsub.

com.

- Download data via USB cable (optional accessory).

- Ultra-durable structure treated for improved resistance to blows, corrosion, and swings in temperature.

- LCD screen with contrast and adjustable-intensity backlighting.

- Long-lasting CR2450 battery.

- Available in version with crown, buttons, and buckle in stainless steel (ACTION) or with HR treatment (ACTION HR).

Specifications

Manual

Technical specifications of SEAC Action HR

Battery Type

CR2450
Water Resistance Rating

Dive Computer
Color

Black
Recommended Use

Diving
Features

Nitrox compatible
Features

Diameter <50 mm

Features of SEAC Action HR

Color Black

Color

Black

Recommended Use Diving

Recommended Use

Diving

Features Nitrox compatible

Features

Nitrox compatible

Diameter <50 mm

Key differentiators

Features a comprehensive set of safety alarms, including MOD exceeded and ascent speed warnings.

Manages recreational dive profiles with a Bühlmann ZHL-16C decompression algorithm.

Nitrox compatible for mixes with O2 concentrations up to 99%.

Versatile three-mode operation: SCUBA, GAUGE, and FREEDIVING.

Technology in SEAC Action HR dive computer

Energy rating

Warnings

4.88 / 5

16 Reviews

What our customers are saying about SEAC Action HR dive computer

Experience a user-friendly dive computer with a clear LCD screen, offering essential dive parameters for air, nitrox, and freediving. Its logical menus and easy setup make it ideal for beginners and experienced divers. Enjoy a wallet-friendly price, cool design, and robust features like the Bühlmann ZHL-16C algorithm. Some users noted a short strap and a desire for Bluetooth integration, while others found the dive log record and freediving capabilities particularly impressive. The 1-meter free dive depth is a standout feature for pool use

Seac Action HR Dive Computer

2025/09/02

FARIDA

The Seac dive computer is intuitive and user-friendly, making it a great choice for both beginners and experienced divers. However, due to the brand's lower market presence, finding accessories like tempered glass screen protectors and other compatible add-ons can be a bit challenging. Still, the device itself performs well and offers good value for its price.

Nice and simple

2025/03/09

IDinternational

I do not like the trend of overpriced color screens in dive computers that have limited battery life. Wanted to have some simple, watch size with long lasting and user replaceable battery diving computer. Seac action HR is exactly that. Has LCD screen with good arrangement of all dive parameters, logical-easy to setup menus, supports air , nitrox and free dive. Logs transfer is only possible by cable which is not expensive, but some BT integration would be better and do not thing will increase the price. Had only two dives to test it and works well. Time will tell about durability

Super

2024/06/30

nuno Correia

Super, all hi need

Best one

2024/05/18

My second SEAC dive computer

Wallet-friendly price, cool design, full set of features AIR/EANx/FREE. Thanks

Easy

2023/11/06

Carlos

easy to use and very comfortable, one drawback is that the strap is short depending on the dry suit.

Deco calculations should be updated by SEAC...

2023/04/17

Vlad

Good computer especially with its "form factor" - it has the largest working area of the display with minimum useless "frames" found on the majority of others. However, it has some unfortunate errors in deco calculations. For example, it calculates saturation differently for "metric" and "imperial" settings. Imperial settings lead to noticeably more conservative results in addition to the rather conservative algorithm (f-factors) already chosen by SEAC. SEAC should fix it with software updates. The possibility of larger f-factors would be very welcomed also.

Glad to have it!

2022/11/20

Juan Antonio González Hidalgo

I already had contact with the SEAC computers (screen) and now the Action. It is easy to use, the successive ones are controlled well (intensive use) and I like the unmodified Bühlmann ZHL-16C algorithm. Hope the battery is as easy to change as they say.

Very good computer!

2022/11/12

Ariel

I bought this computer because of its small size, before I had the Cressi Leonardo and its operation is much superior, in addition to the algorithm that, being Buhlmann, is in my opinion much superior

good

2022/10/14

dsd

ely, not as soft as we would like. The undoubted advantage is the depth of operation for diving in the free mode of 1 meter. This allows you to use this computer in the pool. Not many freedive computers can boast this or less depth. There are also some questions regarding the logic of the computer. It would be nice to add a protective film for the glass to the kit.

Gooooooood

2022/06/11

Ghwas

Good Computer , I really like

Wirth to buy

2022/05/28

Janos

Perfect computer full of those functions what need for scuba diving.

Good product

2022/01/20

Ruben

Very good computer, and very easy to use

Backlights

2021/12/28

Danila

Light button doesn’t work. Still want my prize for review.

Seac action HR

2021/12/04

Davor Pelivanović

Very nice product. Bracelet is a little bit stiff. Display is crystal clear and visible from any angle. Easy to use. Simple menu. Can’t wait to test it in water.

VERY with this product

2021/04/04

Hao

Very easy to use, I’ve only used for free dive and extremely happy with the dive log record and the feel and look of this product. 4 button function simple to use and looks good. I got the black one and I recommend this watch to Freedivers

It's good for diving

2021/03/20

AaronLin

The screen is clear, easy to use, look forward to the start of the diving season

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Include AI Generated questions and answers

2026-07-29

Generated by AI and verified

What are the main functions of the Seac Action HR dive computer?

Answer of Generated by AI and verified

The Seac Action HR is a wrist-mounted dive computer with three primary modes. The SCUBA mode manages recreational dive profiles using a Bühlmann ZHL-16C algorithm for one or two nitrox mixes. The GAUGE mode provides a depth gauge and stopwatch for independent dive profile management. The FREEDIVING mode tracks dive and surface time, as well as current and maximum depth.

* Generated by AI based on customer and product data

2026-07-29

Generated by AI and verified

Is the battery on the Seac Action HR replaceable by the user?

Answer of Generated by AI and verified

Yes, the Seac Action HR features a user-replaceable CR 2450 lithium coin battery, allowing you to easily change it yourself without needing to send it for service.

* Generated by AI based on customer and product data

2026-07-29

Generated by AI and verified

What dive modes are available on the Seac Action HR?

Answer of Generated by AI and verified

This dive computer includes three main modes to suit different underwater activities: SCUBA mode for recreational diving with nitrox support, GAUGE mode for use as a depth gauge and timer, and FREEDIVING mode to track your freediving sessions.

* Generated by AI based on customer and product data

2026-07-29

Generated by AI and verified

Can I use the Seac Action HR for both scuba diving and freediving?

Answer of Generated by AI and verified

Absolutely. The Seac Action HR is designed for versatility, offering a dedicated SCUBA mode for managing recreational dive profiles and a separate FREEDIVING mode that tracks key metrics like dive/surface time and depth. This makes it a reliable partner for both disciplines.

* Generated by AI based on customer and product data

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Frequently bought together

Best sellers

Use cases

Recreational SCUBA Diving 100% Fit

This computer is a versatile and reliable upgrade for regular SCUBA divers, offering multiple modes and comprehensive safety features. The user-replaceable battery and robust logbook memory make it a great all-rounder for tracking and planning dives.

SCUBA dive mode,Bühlmann ZHL-16C algorithm,Nitrox compatible up to 99% O2,40-hour SCUBA logbook memory,User-replaceable CR2450 battery

Freediving and Apnea Training 100% Fit

With a dedicated freediving mode and specific logbook memory, this computer provides solid performance for committed freedivers. It reliably tracks dive data, allowing users to monitor progress and enhance their breath-hold sessions.

Freediving mode,18-hour freediving logbook memory,Ascent speed alarm,LCD screen with adjustable backlighting

Backup or Technical Diving Gauge 80% Fit

The dedicated 'GAUGE' mode allows this computer to function as a reliable bottom timer, making it a solid choice as a backup device for more complex dives. Its clear LCD display and robust safety alarms provide essential data at a glance.

GAUGE dive mode,Stainless steel construction,MOD exceeded alarm,Deco stop violated alarm

Dive Data Logging and Analysis 70% Fit

For divers who enjoy analyzing their performance, this computer offers enhanced functionality through its software compatibility. It allows for detailed post-dive review on a PC or Mac, making it a feature-rich tool for tracking progress over time.

Optional USB data download,Dive Manager software compatibility (MAC/PC),40-hour SCUBA logbook,18-hour freediving logbook

Best for

Best for Tech-Focused Divers

With SCUBA, GAUGE, and FREEDIVING modes, a proven Bühlmann ZHL-16C algorithm, and extensive safety alarms, this computer offers the feature-rich functionality and trustworthy performance you need to manage your dives.

Dive modes: SCUBA, GAUGE, FREEDIVING; Algorithm: Bühlmann ZHL-16C; Safety alarms: MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, maximum permitted altitude warning

A Reliable Upgrade for Hobbyist Divers

This computer is a great all-rounder, offering Nitrox compatibility and a robust logbook to track your underwater adventures, making it a solid performance upgrade for your dive kit.

Nitrox compatible: yes; Logbook memory scuba hours: 40 hours; Logbook memory freediving hours: 18 hours

Ideal for Data-Driven Professionals

Featuring extensive logbook memory and compatibility with Dive Manager software for post-dive analysis on PC/Mac, this computer serves as a trustworthy dive companion for tracking and reviewing performance.

Logbook memory scuba hours: 40 hours; Software compatibility: Dive Manager software for MAC/PC (requires Windows 10); Usb data download: optional accessory

Benefits

FunctionalTrack and Analyze Your Dives with Ease

With a 40-hour logbook memory for SCUBA mode, you can store a significant number of dives before needing to offload data. For post-dive analysis, the computer is compatible with Dive Manager software for both Mac and PC, allowing you to review and manage your dive profiles (USB cable is an optional accessory).

Logbook memory scuba mode: 40 hours

Software compatibility: Dive Manager software for MAC/PC (requires Windows 10)

Usb data download: optional accessory

FunctionalEasily View Your Dive Data Underwater

The watch features an LCD screen with adjustable contrast and backlighting. This allows you to customize the display for optimal clarity, ensuring you can read your critical dive information at a glance, whether you're in bright, shallow water or on a deeper, darker dive.

Adjustable brightness: true

FunctionalEasily Replace the Battery and Keep Diving

Designed for convenience, this dive computer features a user-replaceable battery. This eliminates the need to send the unit in for service, saving you time and ensuring your computer is always ready for your next dive trip.

User replaceable battery: true

Ideal buyer profiles

The Tech-Savvy Diving Enthusiast

This diver is passionate about the technical aspects of diving and wants a computer that offers robust features and data management. They appreciate the ability to manage different gas mixes, track detailed dive logs, and analyze their performance post-dive.

The Seac Action HR is an excellent match, featuring SCUBA, GAUGE, and FREEDIVING modes. It uses the Bühlmann ZHL-16C algorithm and supports Nitrox with O2 concentrations up to 99%. The 40-hour SCUBA logbook and compatibility with Dive Manager software for PC/Mac allow for comprehensive post-dive analysis, although the USB cable is an optional accessory.

The Adventurous Hobbyist Diver

This individual dives regularly for recreation and adventure, exploring different environments. They need a reliable, easy-to-use computer that handles various dive scenarios without being overly complex, prioritizing safety and core functions.

With its multiple dive modes (SCUBA, FREEDIVING, GAUGE) and a comprehensive suite of safety alarms—including for ascent speed and deco stops—this computer provides the core functionality and safety net this diver needs. The user-replaceable battery is a practical feature for dive trips, and the adjustable backlight on the LCD screen ensures readability in various conditions.

The Professional Diver

As a divemaster, instructor, or guide, this user requires a durable and dependable tool for daily use. Key features for them include a clear display, robust safety alerts, and the ability to manage multiple dives and students safely.

The Seac Action HR meets professional demands with its stainless steel construction and proven Bühlmann ZHL-16C algorithm. The extensive safety alarms (MOD, deco violation, ascent speed) are crucial for managing personal and group safety. The GAUGE mode offers essential bottom-timer functionality, and the 40-hour logbook is sufficient for tracking numerous dives.

Competitive features

When evaluating the Seac Action Hr Dive Computer against its peers like the Sherwood Scuba Logic and Mares Sirius models, we find a competitive landscape where key differentiators lie in the specific dive modes and software integration rather than major hardware disparities. While many competitors offer core dive computer functionality, the Seac Action HR stands out with its clear focus on versatility for both recreational scuba divers and freedivers, supported by a robust algorithm and data management tools.

Where it excels

Versatile Dive Modes: The Seac Action HR provides dedicated modes for SCUBA, GAUGE, and FREEDIVING, making it a flexible choice for divers who participate in different types of underwater activities. Advanced Scuba Functionality: It incorporates the Bühlmann ZHL-16C algorithm and supports management of up to two different nitrox mixes, offering sophisticated dive planning capabilities often sought by enthusiastic divers. Post-Dive Analysis: With the ability to log up to 40 hours of dives and connect to the free Dive Manager software, it offers excellent tools for users who want to review and analyze their dive profiles in detail.

Consider alternatives if...

Verdict

The Seac Action Hr Dive Computer is a strong and versatile option for both recreational scuba divers and freedivers. Its user-friendly interface, combined with powerful features like a multi-gas Bühlmann algorithm and dedicated freediving mode, makes it a reliable partner for underwater exploration. The inclusion of post-dive analysis software adds significant value, allowing divers to track their progress and experiences. While it shares a similar price point with many competitors, its specific feature set provides a compelling case for those who value versatility and detailed data logging.

Specs comparison

	SEAC Action HR dive computer	Seac Action Dive Computer
Material	stainless steel	stainless steel
Adjustable Brightness	true	yes
Alarm Function	MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, NoFly time and desaturation calculations, maximum permitted altitude warning	MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, NoFly time and desaturation calculations, maximum permitted altitude warning
Battery Life	user-replaceable	40 hours
Dive Modes	SCUBA, GAUGE, FREEDIVING	SCUBA, GAUGE, FREEDIVING
User Replaceable Battery	true	true
Water Resistance	Dive Computer	true
Type	wrist	wrist-mount
Battery Type	CR2450	CR2450

Specs vs competitors

	SEAC Action HR dive computer	Aqualung I300c Dive Computer	Cressi King Dive Computer	H.dessault By C4 Stark Dive Computer	Genesis Scuba Centauri Dive Computer	Sherwood Scuba Logic Dive Computer
Material	stainless steel	-	Mineral Glass	Synthetic Polymer, Stainless Steel	Durable and lightweight housing	-
Adjustable Brightness	true	yes	No	Yes	-	-
Alarm Function	MOD exceeded alarm, deco stop violated alarm, ascent speed alarm, NoFly time and desaturation calculations, maximum permitted altitude warning	yes	Visual and audible alarms for enhanced safety	customizable audible and visual alarms	audible and vibration alarms	Audible and Visual Alarms - Diver Selectable
Battery Life	user-replaceable	-	Long-lasting Battery	CR2450	Long Battery Life	Replaceable CR2450 Battery
Dive Modes	SCUBA, GAUGE, FREEDIVING	Air, Nitrox, Gauge, Free	Multiple modes: Dive (Air/Nitrox), Freediving, Gauge, and Off	Scuba, Gauge, Freediving	Scuba (Air/Nitrox), Gauge, Freedive, and Watch modes	Air, Nitrox, Gauge
Max Depth Rating	<50 mm	100m/330 ft	120 M	100 Meters	-	suitable depth rating
User Replaceable Battery	true	yes	User-replaceable battery	Yes	No	Yes
Water Resistance	Dive Computer	-	120 M	100 Meters	-	-
Gps	no	-	Yes	-	-	-
Type	wrist	-	Dive Computer	watch-style	wrist-mount	puck-style
Battery Type	CR2450	user-changeable battery	-	CR2450	USB Rechargeable batterie	Replaceable CR2450 Battery