Oceanic Geo 2

Reviews about Oceanic Geo 2

Oceanic Geo 2:

Quality, Function and Style.

The GEO 2.0 has an upgraded look with a stainless steel accent ring and new color combination - and now includes Dual Algorithm, Deep Stop option and a redesigned user interface with "Step Back" - which allows forward and backward navigation through menus and settings.

Additionally, a second Nitrox mix (both programmable to 100%) is available, as well as Firmware Auto-Update which allows the user to download and install operational improvements or even future new features through the PC Interface (with optional cable).

A unique combination of quality, function and style, the GEO 2.0 PDC is perfect on its own or as a backup to any dive computer.

With Dual Algorithm and optional conservative factor settings, the GEO 2.0 may be programmed to provide no-deco and deco profiles similar to virtually every computer on the market.


- Powered by Oceanics Exclusive Dual Algorithm- - Your choice between Pelagic DSAT (Spencer/Powell data basis) or Pelagic Z+ (Buhlmann ZHL-16C data basis)

- 4 Operating Modes: WATCH (Alternate Time, Chrono, Daily Alarm, Countdown Timer), NORM (Air and Nitrox), GAUGE (with run timer) and FREE (tracks calculations to allow switching between NORM and Free)

- User-Friendly Interface with "Step Back" - allows forward and backward navigation through menus and settings

- Switch between up to 2 Nitrox mixes to 100% O2 with no restriction (Gas 1 may be up to 100%, and may be less or greater than Gas 2)

- Stop times <3 minutes - displays minutes & seconds

- Deep Stop with Countdown Timer - Maybe turned on or off. 2 minute countdown at half your max depth, for dives greater than 80 ft / 25m

- Single button access to "Last Dive" display (max depth & bottom time)

- Data Retention - maintains calculations indefinitely when the battery is changed

- Audible Alarm with flashing LED light

- 24 dive on-unit log book

- History Mode includes total number of dives, max depth, total dive hours, and lowest temp

- Optional PC Interface with OceanLog Download and Settings Upload

- Firmware Auto-Update: download and install the latest firmware - these may be operational improvements or even new features

- Choose the one dive computer that-s liberal, conservative or middle-of-the-road.

- Oceanic-s new GEO 2.0 offers Dual Algorithm- technology, letting you choose the decompression algorithm that best suits your diving needs without compromising safety.


Choose Pelagic DSAT for:

Liberal Recreational Diving:

The Pelagic DSAT Algorithm safely maximizes dive time for repetitive, multi-level recreational diving.

This algorithm relies on the human Doppler studies used to develop PADI-s Recreational Dive Planner (RDP), and has been the basis of Oceanics and other manufacturers computer algorithms for many years.

To add additional conservatism, you can also adjust the:

- Tissue-Loading Bar Graph Alarm

- Conservative Factor Setting


Choose Pelagic Z+ for:

- Conservative Recreational Diving

- When applied to standard recreational diving, the Pelagic Z+ Algorithm basis increases the conservative factor of the GEO 2.0 by 15-20%.


Liberal Repetitive Deep and Decompression Diving:

The Pelagic Z+ uses the Buhlmann ZHL-16C database, which was conducted to meet the more rigorous demands of repetitive, cold-water decompression diving at altitude. The Pelagic Z+ mode maximizes dive times at depth without penalties.

Dive in sync with any buddy, anywhere:

Because the GEO allows you to adjust the algorithm basis and its conservatism, you can adjust to closely match just about any other dive computer on the market, allowing you and any buddy to always dive in sync.

Diving the same profile increases safety for both divers, and eliminates the need for one person to conduct a much longer or deeper stop when buddying with someone wearing a more liberal dive computer.

On repetitive dives, there is no more waiting for the more conservative dive computer to clear.

Both buddies will be ready to enter the water at the same time and can continue to dive the same profiles.

You can-t control which dive computer your buddy wears, but you can control your ability to dive the same profile.


A note about deep stops:

Both algorithms allow (user ON/OFF option) credit for deep stops for No-Decompression dives in keeping with the data of Morroni et al (2004) and Bennett et al (2007).

No penalty is given if the diver skips the deep stop, but it is strongly recommended that a shallow safety stop be made with or without the deep stop in keeping with the experiments of Pilmanis (1975).

It is important to note that neither algorithm provides deep stops for decompression dives since there is ample experimental data [Blatteau et al (2005), Gerth et al (2007), and Gutvik et al (2007)] that indicate that this practice often produces an increase in the risk of DCS.



FEATURES & FUNCTIONS GEO 2.0:

- Modes of Operation Watch, Norm (Air / Nitrox) Gauge, and Free Dive

- Push Buttons 4

- User Interface Click forward, Fast Scroll and Step Back

- Mounting Options Wristwatch

- Activation Water or Push Button

- Algorithm Basis Dual Algorithm-

- Your choice between Pelagic DSAT (Spencer/Powell data basis) or Pelagic Z+ (Buhlmann ZHL-16C data basis)

- Personal Conservative Factor Adjustment

- Each Level provides No Decompression Limits for the next dive +3000 ft altitude

- Altitude Algorithm Basis NOAA

- O2 Limit Basis NOAA

- Tissue Compartments 12 (5 to 480 minutes)

- Automatic Altitude Adjustment 2,000 - 14,000 ft

- Decompression Capability 10 - 60 ft (3-18 m)

- Deep Stop OPTIONAL - :02 COUNTDOWN TIMER AT 1/2 MAX DEPTH FOR DIVES DEEPER THAN 80 ft/25m

- Automatic Safety Stop Prompt YES - ADJUSTABLE DEPTH AND TIME

- Audible Alarm YES - MAY BE DEACTIVATED AND/OR CUSTOMIZED BY USER

- Alarm Acknowledgment (U/W Deactivation) YES - PUSH BUTTON DEACTIVATES CURRENT ALARM

- Ascent Rate Range 11-30 fpm / 21-60 fpm

- Ascent Rate Maximum 30 fpm (<60 ft) 60 fpm (>60 ft)

- SmartGlo Backlight YES - ADJUSTABLE DURATION

- Diver Replaceable Batteries YES

- Battery Type CR2430

- Battery Life* 300 DIVE HOURS

- Data Retention (retains calculations indefinitely during battery change) YES

- Low Battery Indicator (Graphic) YES

- Calendar / Clock DATE & TIME

- Operating Depth (NORM/FREE) 330 ft / 100 m

- Operating Depth (GAUGE) 330 ft / 100 m

- 24 Hour Time to Fly Countdown YES

- Gauge Mode Run Timer YES

- Calculated Desaturation Fly Countdown YES

- Dive Mode Displays MAIN, UP TO 2 ALTERNATES AND 1 SECONDARY

- High O2 Alarm / Warning 300 SOTU / DOTU

- High PO2 Alarm / Warning 1.6 DEFAULT OR USER SETTING

- On-Unit Log Capacity 24 DIVES

- PC Data Download OPTIONAL

- PC Settings Upload OPTIONAL

- Firmware Update OPTIONAL

- OceanLog Download Memory Capacity 512K**

- Pre-Dive Planning Sequence PUSH BUTTON 30-190 ft

- Temperature Display YES

- Nitrogen Tissue Loading Bar Graph YES

- Oxygen Loading NUMERIC %

- Variable Ascent Rate Bar Graph YES

- No Decompression Time Remaining Display YES

- O2 Time Remaining Display YES

- Set Mode with Rapid Advance YES

- Set Mode with "Step Back" YES

- Set FO2 Value (%) Gas 1 AIR, 21-100%

- Set FO2 Value (%) Gas 2 OFF, 21-100%

- Set Audible Alarm On/Off YES

- Set Max Depth Alarm YES

- Set Elapsed Dive Time Alarm YES

- Set Maximum Nitrogen Tissue Loading Bar Graph Alarm YES

- Set Personal Conservative Factor YES

- Set Dive Time Remaining Alarm YES

- Set Units Of Measurement YES

- Set Hour Format (12/24 Hour) YES

- Set Time of Day YES

- Set Date YES

- Set Maximum PO2 Alarm YES

- Set FO2 50% Default YES

- Set Backlight Duration YES

- Set Safety Stop Time and Depth YES

- Set Sampling Rate (OceanLog Download) 1 (Free Dive Mode Only)/ 2/15/30/60 SECONDS

- Set Digital Gauge Mode On/Off YES

- Set Water Activation On/Off YES

- Set Free Dive Elapsed Dive Time Alarm YES

- Set Free Dive Countdown Timer YES

- Set Free Dive Max Depth #1 YES

- Set Free Dive Max Depth #2 YES

- Set Free Dive Max Depth #3 YES



*Battery Life: Battery life estimates are based on full-capacity batteries, and continuous usage as described.


- 7 days per week

- 2 dives per day

- 1 hour dive time

- 2 hour surface interval

- 18 hour interval from last dive to the first of the next day

** Oceanic Personal Dive Computers have user selectable Sampling Rates that determine when data is sampled and stored for subsequent download to associated PC interface programs.

More frequent sampling provides more data per dive yet results in storage of fewer dives for download. Use with Air or Nitrox, with or without air integration, dive profiles, Free Diving activities, and other variables may also affect the number of dives that can be stored.


Sampling Rate:

512K Estimated Capacity

60 Seconds 100-110 Hours

30 Seconds 50-55 Hours

15 Seconds 25-30 Hours

2 Seconds 4-5 Hours

1 Seconds (Free Dive) 1.5-2 Hours