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Geo 4.0 Dive Computer

£319.00 RRP £329.95 SKU: 80510-1

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Oceanic Geo 4.0 Dive Computer - Black
Oceanic Geo 4.0 Dive Computer Oceanic Geo 4.0 Dive Computer Oceanic Geo 4.0 Dive Computer - Black Oceanic Geo 4.0 Dive Computer - White Oceanic Geo 4.0 Dive Computer Oceanic Geo 4.0 Dive Computer

Geo 4.0 Dive Computer

£319.00 SKU: 80510-1

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Geo 4.0 Dive Computer

£319.00 RRP £329.95 Out Of Stock

Brand: Oceanic

Model: Geo 4.0 Dive Computer

SKU: 80510-1

Please note: This item cannot be shipped outside the European Union - learn more

The Oceanic Geo 4.0 Dive Computer is a wrist-watch sized recreational dive computer with a sporty style and clear screen. Worn every day, the Geo4 has all of the modern features you expect in a dive computer from Bluetooth so you can connect to an app and multiple modes such as Nitrox and free diving. Inside Oceanic have used their Dual-Algorithm so you can pick and choose how your dive profile will be so it can match your buddy's computer better.

Who's the Geo 4.0 For?

The Geo 4 is made for most recreational divers, it has all of the functions and modes most should ever need or use. Small enough to wear as a day-to-day wrist watch the Geo4 is aimed more at professional or frequent divers who wear their computer every day and on the dive site.


  • Modes Dive (Air / Nitrox), Gauge, Free, Watch
  • Custom Alarms
  • Dual Algorithm
  • Auto Altitude Adjustment
  • Ascent Rate Monitor
  • Safety Stop: Adjustable with Timer
  • Deep Stop
  • Backlight
  • Diver Replaceable Batteries (3v CR2430)
  • Optional PC Interface 
  • Updatable Firmware 


  • Nitrox Mixes x2 (21 –100%)
  • On-Unit Log Capacity: 24 Dives
  • 50 hours Memory 
  • Warranty 2 years

Oceanic Geo 4.0 Dive Computer - Features

FeatureProduct Specification
Air Integration
A dive computer with air integration allows the diver to view the current cylinder pressure on the dive computer display. Some models also display breathing rates. Air integration can be achieved through either a high pressure hose attachment or by using a wireless transmitter.Close
The built in algorithm that calculates your NDL and recommends when it's safe to ascend.Close
Dual Z+ & DSAT
Apnea Mode
A collection of features developed for free-divers and snorkellers that records how deep you are, how deep you have been and how long you can hold your breath. Some computers include a faster sampling rate, specialized alarms and warnings and specific logbook for apnea.Close
Computer Style
The format denotes the style of the computer, whether it is a standard wrist sized unit with large easy to read display, a smaller watch sized unit which can be worn for every occasion but still packs in all the same features or a console mounted unit which are available with or without air hose integration.Close
Watch Sized
A PC Interface alllows divers to download previous dive information and profiles for viewing and analysis on a PC or smart device via an app. Depending on the model of dive computer this can include depths, times, alerts, breathing rates, temperatures, etc.Close
Display Type
The type of screen affects what and how information can be displayed on a dive computer screen. The simplest is a segment display that builds up characters using pieces of a fixed screen like a digital wrist watch. This is cost effective but limits the use of complex details. A partial dot matrix screen stills uses a section of segment display for numbers but also has a section of tightly group squares that allow for text or graphs to be shown on the screen. A full dot matrix screen completely does away with the segment section of the screen to give full use of the display. Colour LCD screens use the same technology found in TVs to provide a high resolution colour display that gives very clear, vibrant dive information. The technology is more expensive but raises the computer to a new level. OLED screens use a display of tiny LEDs that are very efficient and super sharp. The screen doesn't require a power hungry backlight and can still be seen in very low visibility.Close
Gas Nitrox
A Nitrox or EAN (Enriched Air Nitrox) compatible dive computer allows divers to benefit from the advantages of diving with an enriched oxygen gas mix including extended dive time without incurring mandatory decompression stops during the ascent.Close
21 to 100
Gas Trimix
A trimix compatible dive computer allows a suitably qualified diver to take advantage of the benefits of a Trimix gas consisting of oxygen, helium and nitrogen. Advantages include extended range diving and reduced narcosis effectsClose
Integrated Compass
An integrated compass helps to reduce additional pieces of equipment that need to be carried. Some console computers are equipped with a standard magnetic compass. A number of computers now feature an electronic compass that is built into the unit itself and operated through the menu system. The electronic compass shows the magnetic North all over the planet by recalibrating the compass for your current location.Close
Multiple Gases
Gas switching allows divers to use more than one gas mix whilst diving. For example, it allows a diver to switch from main breathing gas to an enriched oxygen mix to decompress faster when ascending.Close
Rebreather Mode
A dedicated Closed-Circuit-Rebreather Mode that, depending on the computer, you can adjust and plan high and low setpoints, open circuit bailoutsand other features for diving with a rebreatherClose
User Changeable Battery
Modern dive computers allow divers to safely change the battery themselves with minimal risk of damage through flooding due to incorrect installation. The logbook and memory of previous dives are typically saved during the battery change. Watch sized dive computers typically still have to be returned to an authorised dealer to have their batteries change as special tools and usually needed to open the body.Close
Please note: This item cannot be shipped outside the European Union - learn more

We offer free tracked UK standard delivery on orders over £50.

Standard UK delivery is £3.95 for orders under £50. You will receive your order 2 - 4 days from the date of despatch. Order by 3pm on a working weekday and we will aim to despatch the same day.

Next Working Day for the UK is £6.95.

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We hope you will be completely satisfied with any product purchased from Simply Scuba.

However, you can return it for any reason within 14 days from the date of despatch for a full refund (less postage costs).

Royal Mail tracked return option within the UK for your convenience.

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