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SEAC

SEAC Action HR dive computer

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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

    Blue

  • Color

    Black

  • Recommended Use

    Diving

  • Features

    Nitrox compatible

  • Features

    Diameter <50 mm

Features of SEAC Action HR

Color Blue

Color

Blue

Black

Black

Recommended Use Diving

Recommended Use

Diving

Features Nitrox compatible

Features

Nitrox compatible

Diameter <50 mm

Diameter <50 mm

Key differentiators

Comprehensive safety features including alarms for MOD, deco stop, and ascent speed

Data analysis via free Dive Manager software for MAC/PC (requires optional USB cable)

Extensive logbook with 40 hours for scuba and 18 hours for freediving

Powered by the Bühlmann ZHL-16C decompression algorithm for single or dual nitrox mixes

Versatile dive management with SCUBA, GAUGE, and FREEDIVING modes

Technology in SEAC Action HR dive computer

Energy rating

Warnings

4.75 / 5

4 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

Three good

2023/07/19

Remi

I bought this computer because I saw it used by my divemaster on safari - very good computer overall - to buy without fear

SEAC Action HR dive computer

great freedive watch

2021/11/24

alex

Superfast shipping. The watch is great with all the functions you need for freediving and scuba diving

SEAC Action HR dive computer

Good computer

2021/09/16

Alexander

This is not my first computer and will be used exclusively in freediving mode. I can't say anything about diving conditions. Large, comfortable, the font is large enough, the strap is long, but, unfortunately, 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.

SEAC Action HR dive computer

Great

2021/06/18

Otto Mostaert

My first computer. It has all the functions I need. I'm really enjoying it.

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Include AI Generated questions and answers

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

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

Answer of Generated by AI and verified

The Seac Action HR is a wrist-mount dive computer designed for both scuba diving and freediving. It features three main modes: SCUBA, GAUGE, and FREEDIVING. It utilizes a Bühlmann ZHL-16C algorithm for managing recreational dive profiles with up to two nitrox mixes. The unit has a backlit LCD screen, an ultra-durable structure, and multiple safety alarms.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

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

Answer of Generated by AI and verified

Yes, the Seac Action HR uses a long-lasting CR2450 lithium coin battery that is user-replaceable.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

What kind of safety alarms does the Seac Action HR have?

Answer of Generated by AI and verified

Yes, this dive computer is equipped with several safety alarms to enhance diver safety. These include alarms for exceeding MOD, deco stop violations, and ascent speed. It also provides No-Fly time and desaturation calculations, along with a maximum permitted altitude warning.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

What dive modes are available on the Seac Action HR?

Answer of Generated by AI and verified

The Seac Action HR supports four main dive modes: Air, Nitrox, Gauge, and Freedive. The SCUBA mode manages recreational profiles for one or two mixes, including air and nitrox with O2 concentrations up to 99%.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

What is the logbook memory capacity of this dive computer?

Answer of Generated by AI and verified

The Seac Action HR can store up to 40 hours of dive logs in SCUBA mode, with records taken every 5 seconds. In FREEDIVING mode, it stores up to 18 hours of activity with records taken every 2 seconds.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

What decompression algorithm does the Seac Action HR use?

Answer of Generated by AI and verified

This dive computer uses the Bühlmann ZHL-16C decompression algorithm for managing recreational dive profiles.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

Is the Seac Action HR suitable for freediving?

Answer of Generated by AI and verified

Yes, the Seac Action HR is designed with a dedicated FREEDIVING mode. This mode tracks essential data such as dive and surface time, as well as current and maximum depth, making it a reliable tool for freedivers.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

Can I use this computer for diving with Nitrox?

Answer of Generated by AI and verified

Yes, the SCUBA mode on the Seac Action HR fully supports diving with Nitrox. It can manage profiles for one or two mixes with oxygen concentrations up to 99%.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

How can I download and analyze my dive data from the Seac Action HR?

Answer of Generated by AI and verified

You can analyze your dive data using the free Dive Manager software, which is compatible with both Mac and PC (requires Windows 10). To download the data from the computer, a USB cable is required, which is available as an optional accessory.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

How does the Seac Action HR compare to the Aqualung i300C?

Answer of Generated by AI and verified

The Seac Action HR is a wrist-mount dive computer with multiple modes including air, nitrox, gauge, and freedive. For detailed comparisons, we recommend reviewing the specific features of each model to see which best suits your diving needs.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

SEAC Action HR dive computer

What are the differences between the Seac Action HR and the Mares Smart Apnea computer?

Answer of Generated by AI and verified

The Seac Action HR offers SCUBA, GAUGE, and FREEDIVING modes and uses a user-replaceable CR2450 battery. The Mares Pure Passion Smart Apnea Dive Computer has a stated water resistance and max depth rating of 150m. When choosing, consider which dive modes and features are most important for your underwater activities.

* Generated by AI based on customer and product data

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Use cases

Recreational Scuba Diving 90% Fit

This is a versatile, feature-rich computer ideal for regular recreational divers. The user-friendly interface, multiple safety alarms, and robust logbook make it a reliable upgrade for tracking and managing dives on air or Nitrox.

Bühlmann ZHL-16C algorithm,Air and Nitrox modes,Comprehensive safety alarms,40-hour SCUBA logbook

Freediving 90% Fit

With a dedicated Freedive mode and a separate 18-hour logbook, this computer offers solid performance for breath-hold divers. It provides essential data for tracking sessions and enhancing safety during freediving activities.

Freedive mode,18-hour freediving logbook,User-friendly interface,Safety alarms

Dive Data Analysis 80% Fit

For divers who enjoy reviewing their performance, this computer allows for post-dive analysis. Dive profiles can be downloaded and managed with the Dive Manager software, offering enhanced functionality for tech-savvy users.

USB data download capability,Software compatibility with MAC/PC,Extensive logbook memory

Use as a Backup or Gauge 85% Fit

The dedicated Gauge mode allows the computer to function as a reliable bottom timer, displaying depth and time without decompression calculations. This makes it a great all-rounder, suitable as a primary gauge or a dependable backup for more technical dives.

Gauge mode,Durable stainless steel and resistant structure,Clear LCD with adjustable brightness,User-replaceable battery

Best for

Best for the Data-Driven Diver

With USB data download and compatibility with Dive Manager software for MAC/PC, this computer allows for detailed post-dive analysis and digital logging.

Data download method: USB cable (optional accessory), Software compatibility: Dive Manager software for MAC/PC (requires Windows 10)

A Reliable Upgrade for Regular Divers

This computer offers a great all-round package with multiple modes including Air, Nitrox, and Freedive, a robust stainless steel build, and a long-lasting user-replaceable battery.

Dive modes: ["air", "nitrox", "gauge", "freedive"], Material: stainless steel, User replaceable battery: yes

Ideal for Safety-Conscious Diving

This unit provides trustworthy performance with its highly-rated safety alarms, accurate depth monitoring, and the reliable Bühlmann ZHL-16C decompression algorithm.

Algorithm: Bühlmann ZHL-16C

Benefits

FunctionalReliable Performance for Every Dive

Engineered with an ultra-durable structure treated for resistance to blows and corrosion, this dive computer is built to last. The long-lasting, user-replaceable CR2450 battery ensures it's ready for your underwater adventures.

User replaceable battery: yes

FunctionalLog and Analyze Your Dives

Easily review your dive history and analyze performance with extensive logbook memory, storing up to 40 hours for scuba and 18 hours for freediving. Data can be transferred to a Mac or PC for in-depth analysis using the Dive Manager software via an optional USB cable.

Logbook memory scuba hours: 40 hours

Logbook memory freediving hours: 18 hours

Data download method: USB cable (optional accessory)

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

Ideal buyer profiles

The Tech-Savvy Diving Enthusiast

This diver is passionate about analyzing their performance and dive metrics. They value the ability to download, review, and manage their dive data on a computer to track progress and plan future dives.

The Seac Action HR supports data download via an optional USB cable to the Dive Manager software, which is compatible with both Mac and PC. With a 40-hour scuba logbook memory and the advanced Bühlmann ZHL-16C algorithm, it provides extensive data for post-dive analysis.

The Adventurous Hobbyist Diver

This diver enjoys exploring various underwater environments, from recreational scuba to freediving. They need a reliable, versatile, and durable computer that can handle different types of dives without being overly complex.

This computer offers SCUBA (Air/Nitrox), Gauge, and Freedive modes, making it highly versatile. Its ultra-durable stainless steel construction and extensive safety alarms—including ascent speed and deco stop warnings—provide the robust performance and peace of mind needed for varied underwater adventures.

The Professional Diver

For this user, diving is a profession. They require a dependable and precise instrument that provides critical safety information and detailed dive data. Reliability, robust construction, and a proven decompression algorithm are non-negotiable.

The Seac Action HR utilizes the trusted Bühlmann ZHL-16C decompression algorithm for reliable dive planning. It features a comprehensive suite of alarms for critical safety monitoring and is built with a durable stainless steel structure, making it a trustworthy tool for professional use.

Competitive features

The Seac Action Hr Dive Computer is a versatile wrist-mount unit designed for both scuba and freediving users. It offers multiple modes and essential features for tracking dives. When we compare it to other dive computers in a similar price range, such as the Sherwood Scuba Logic and various Mares models, the key differentiators are found in the specific dive modes and algorithms offered, as the provided data shows minimal variation in other technical specifications.

Where it excels

Versatility for Different Dive Types: With dedicated SCUBA, GAUGE, and FREEDIVING modes, the Action HR caters to a broader range of underwater activities compared to more specialized computers. Recreational Scuba Management: It manages recreational dive profiles using the well-regarded Bühlmann ZHL-16C algorithm and supports up to two nitrox mixes, offering flexibility for divers who use enriched air. Post-Dive Analysis: The ability to log up to 40 hours of dives and analyze the data with the free Dive Manager software provides a comprehensive tool for tracking performance and experience over time.

Consider alternatives if...

Verdict

The Seac Action Hr Dive Computer is a strong contender for divers seeking a reliable, multi-purpose device without a significant investment. Its user-friendly interface and three distinct modes make it suitable for both recreational scuba divers and freedivers. While the comparison data does not highlight significant differences in core hardware specifications against its competitors, its combination of a trusted decompression algorithm (Bühlmann ZHL-16C), nitrox support, and robust logging capabilities makes it a dependable choice for underwater exploration.

Specs comparison

Specs vs competitors

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Materialstainless steelstainless steelMineral Glass-Mineral Glass-
Adjustable BrightnessYes--YesNoEL Backlight: For clear visibility in low-light conditions.
Alarm FunctionYesYescustomizable alarms for depth, time, hydration, ascent speed, and recovery timeYesVisual and audible alarms for enhanced safetyMax Diving Depth Alarm: One customizable alarm for your target maximum depth.
Battery Life40 hourslongApprox. 200 Hours Of Diving Over A 2 Year Time Span-Long-lasting Battery-
Dive Modesair, nitrox, gauge, freediveAir, Nitrox, Gauge (Profondimeter), Apnea-Air, Nitrox, Gauge, FreeMultiple modes: Dive (Air/Nitrox), Freediving, Gauge, and Off-
Max Depth Rating1 m-150 m100m/330 ft120 M100 Mt.
User Replaceable BatteryYesUser-replaceable batteryYesYesUser-replaceable batteryYes
Water ResistanceYes-150 m-120 M100m Water Resistant
Typewrist-mount-wrist-Dive Computerwrist
Battery TypeCR2450User-replaceable Batteries-user-changeable battery-CR2032
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