Oceanic Watch / Dive Computer GEO User manual

GEO
Watch / Dive Computer
operating manual

2
FULL LCD
Components:
a. Mode (M) Button
b. Select (S) Button
c. Light (L) Button
d. Advance (A) Button
e. LED Wa ning Light
f. Ba G aph
g. Icon - Log Mode
h. Icon - Ascend
i. Icon - Su face Inte val
O2 Time Remaining
No Deco Time Remaining
Total Ascent Time
FO2 Set Point
j. Icon - Deg ees
k. Icon - Stop Time Requi ed
Elapsed Dive Time
l. Icon - PO2
m. Icon - Nit ox
n. Icon - Daily Ala m set
o. Icon - Low Batte y
p Icon - Depth/Max Depth
q. Icon - Descend
b
c
d
e
g
h
j
k
l
q
o
m
i
p
a
f
n

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CONTENTS
FULL LCD .............................................................................................................................................................. 2
WARRANTY, NOTICES, DECOMPRESSION MODEL ..........................................................................................7
INITIAL ACTIVATION .............................................................................................................................................. 8
INTRODUCTION AND GENERAL FEATURES AND DISPLAYS ........................................................................... 9
INTERACTIVE CONTROL CONSOLE ............................................................................................................. 10
OPERATING MODE STRUCTURE .................................................................................................................. 11
OPERATION AS A DIVE COMPUTER ............................................................................................................. 12
PC INTERFACE ................................................................................................................................................ 13
SYMBOLS AND ALPHA NUMERIC GRAPHICS .............................................................................................. 13
AUDIBLE ALARM ............................................................................................................................................. 13
BAC LIGHT ..................................................................................................................................................... 15
POWER SUPPLY ............................................................................................................................................. 16
WATCH FEATURES AND DISPLAYS ................................................................................................................... 17
LOCAL DEFAULT TIME ................................................................................................................................... 18
MAIN TIME ....................................................................................................................................................... 19
SET MAIN TIME ............................................................................................................................................ 20
ALTERNATE TIME ........................................................................................................................................... 23
SET ALTERNATE TIME ................................................................................................................................ 24
COUNTDOWN TIMER ...................................................................................................................................... 25
SET COUNTDOWN TIMER .......................................................................................................................... 25
CHRONOGRAPH ............................................................................................................................................. 27
DAILY ALARM .................................................................................................................................................. 28
SET DAILY ALARM ....................................................................................................................................... 29
DIVE COMPUTER FEATURES AND DISPLAYS ................................................................................................. 31
BAR GRAPH .................................................................................................................................................... 32
ALPHA / NUMERIC DISPLAYS ....................................................................................................................... 34
Depth Displays .............................................................................................................................................. 4
Time and Date Displays ................................................................................................................................ 4
Temperature Display ..................................................................................................................................... 5

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CONTENTS (continued)
DIVE COMPUTER SURFACE SEQUENCE AND OPERATING MODES ............................................................. 37
DC OPERATING MODES ................................................................................................................................. 38
SURFACE MODE ............................................................................................................................................. 38
NORM Surface Mode .................................................................................................................................... 40
NORM AND GAUG SURFACE SET MODES ................................................................................................... 43
Set F Group (FO2) ....................................................................................................................................... 4
Setting FO2 for Nitrox Dives ......................................................................................................................... 44
Set FO2 50% Default .................................................................................................................................... 46
Set A Group (NORM/GAUG Alarms) ........................................................................................................... 47
Set Audible Alarm .......................................................................................................................................... 47
Set Depth Alarm ............................................................................................................................................ 48
Set EDT (Elapsed Dive Time) Alarm ............................................................................................................. 49
Set TLBG (Tissue Loading Bar Graph) Alarm ............................................................................................... 50
Set DTR (Dive Time Remaining) Alarm ......................................................................................................... 51
Set PO2 Alarm .............................................................................................................................................. 52
Set U Group (Utilities) ................................................................................................................................. 53
Set Wet Activation ......................................................................................................................................... 54
Set Units ....................................................................................................................................................... 54
Set Safety Stop ............................................................................................................................................. 55
Set Conservative Factor ................................................................................................................................ 56
Set Backlight Duration ................................................................................................................................... 57
Set Sampling Rate ........................................................................................................................................ 58
SERIAL NUMBER ........................................................................................................................................ 58
PLAN Mode .................................................................................................................................................. 59
FLY Mode ..................................................................................................................................................... 62
DESAT Mode ................................................................................................................................................ 63
LOG Mode .................................................................................................................................................... 64
HISTORY Mode ............................................................................................................................................ 69

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CONTENTS (continued)
OVERVIEW OF DIVE MODE INFORMATION ...................................................................................................... 71
DISPLAYED SYMBOLS AND ICONS .............................................................................................................. 72
DIVE TIME REMAINING (DTR) ........................................................................................................................ 73
No Decompression DTR (NDC) .................................................................................................................... 7
O2 DTR (OTR) .............................................................................................................................................. 74
VARIABLE ASCENT RATE .............................................................................................................................. 75
ELAPSED DIVE TIME (EDT) ............................................................................................................................ 76
CONTROL OF DISPLAYS ................................................................................................................................ 76
NORM TYPE DIVE MODES ................................................................................................................................. 77
WET ACTIVATION CONTACTS ....................................................................................................................... 78
NORM NO DECOMPRESSION DIVE MODE ................................................................................................... 79
No Deco Safety Stop ..................................................................................................................................... 81
DECOMPRESSION DIVE MODE ..................................................................................................................... 83
VIOLATION MODES ......................................................................................................................................... 86
Conditional Violation ...................................................................................................................................... 86
Delayed Violation #1 ..................................................................................................................................... 87
Delayed Violation #2 ..................................................................................................................................... 88
Delayed Violation # ..................................................................................................................................... 88
Immediate Violation and Violation Gauge Mode ............................................................................................ 89
HIGH PO2 ......................................................................................................................................................... 91
HIGH OXYGEN ACCUMULATION ................................................................................................................... 92
SUMMARY OF WARNING AND ALARM MESSAGES ..................................................................................... 93
NORM POST DIVE MODES ................................................................................................................................. 95
TRANSITION PERIOD ..................................................................................................................................... 96
AFTER THE TRANSITION PERIOD ................................................................................................................. 97
UPLOADING SETTINGS AND DOWNLOADING DATA .................................................................................. 99
PC Compatibility Requirements .................................................................................................................. 100
GAUGE OPERATING MODE ............................................................................................................................. 101
GAUGE MODE ............................................................................................................................................... 102

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CONTENTS (continued)
FREE DIVE OPERATING MODE ....................................................................................................................... 105
FREE Surface Mode ................................................................................................................................... 106
FREE CDT (COUNTDOWN TIMER) .............................................................................................................. 108
Set FREE CDT ............................................................................................................................................ 110
FREE EDT (ELAPSED DIVE TIME) ALARM .................................................................................................. 111
Set FREE EDT Alarm .................................................................................................................................. 111
FREE DEPTH ALARMS (FDA) ....................................................................................................................... 112
Set FDA1 .................................................................................................................................................... 11
Set FDA2 .................................................................................................................................................... 114
Set FDA .................................................................................................................................................... 115
FREE DIVE MODE ......................................................................................................................................... 116
FREE Dive CDT .......................................................................................................................................... 117
FREE Dive Alarms ...................................................................................................................................... 117
REFERENCE ...................................................................................................................................................... 121
CARE AND CLEANING .................................................................................................................................. 122
INSPECTIONS AND SERVICE ....................................................................................................................... 122
BATTERY REPLACEMENT ........................................................................................................................... 123
ALTITUDE SENSING AND ADJUSTMENT .................................................................................................... 128
No Decompression Limits at Altitude ........................................................................................................... 129
OXYGEN EXPOSURE LIMITS ....................................................................................................................... 130
SPECIFICATIONS .......................................................................................................................................... 131
ERROR (RESET DURING A DIVE) ................................................................................................................ 137
INSPECTION / SERVICE RECORD ............................................................................................................... 138
OCEANIC WORLDWIDE ................................................................................................................................ 139
Pay special attention to items marked
with this Warning symbol.

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LIMITED TWO-YEAR WARRANTY
For details, refer to the Product Warranty Registration Card provided. Register on-line at
www.OceanicWorldwide.com
COPYRIGHT NOTICE
This operating manual is copyrighted, all rights are reserved. It may not, in whole or in part, be
copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine
readable form without prior consent in writing from Oceanic / 2002 Design.
GEO Operating Manual, Doc. No. 12-2734
© 2002 Design, 2006
San Leandro, CA USA 94577
TRADEMARK, TRADE NAME, AND SERVICE MARK NOTICE
Oceanic, the Oceanic logotype, the Oceanic 'O' symbol, GEO, the GEO logo, Diver Replace-
able Batteries, Graphic Diver Interface, Tissue Loading Bar Graph (TLBG), Pre Dive Planning
Sequence (PDPS), Set Point, Control Console, and OceanLog are all registered and unregistered
trademarks , trade names, and service marks of Oceanic. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued, or applied for, to protect the following design features:
Data Sensing and Processing Device (U.S. Patent no. 4,882,678). Other patents pending.
User Setable Display (U.S. Patent no. 5,845,235) is owned by Suunto Oy (Finland).
DECOMPRESSION MODEL
The programs within the GEO simulate the absorption of nitrogen into the body by using a
mathematical model. This model is merely a way to apply a limited set of data to a large range
of experiences. The GEO dive computer model is based upon the latest research and experi-
ments in decompression theory. Still, using the GEO, just as using the U.S. Navy (or
other) No Decompression Tables, is no guarantee of avoiding decompression
sickness, i.e. the bends. Every divers physiology is different, and can even vary from
day to day. No machine can predict how your body will react to a particular dive profile.

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GEO Watch/Dive Computers are placed in a Deep Sleep mode prior to being
shipped from the factory. The intent is to extend storage life of the Battery for up
to 7 years, before the unit is initially placed in service.
In this mode, Date and Time are updated as they normally would be. However,
they are not displayed. Upon waking the GEO up, the correct Date and U.S.
Pacific Time will be displayed and it will be ready to operate with full functions.
To wake the GEO up from Deep Sleep mode, simultaneously depress the upper/
right (S) and lower/left (A) buttons for 2 to 3 seconds until the display comes full
ON displaying the MAIN TIME screen, then release them.
NOTE: Once the GEO is brought out of the Deep Sleep mode, it
can only be placed back in it by the factory.
NOTICE
STORAGE and INITIAL ACTIVATION

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WARNING: Prior to diving with the GEO, you must also
read and understand the Oceanic Dive Computer Safety and
Reference Manual, Doc. No. 12-2262, which provides
Important Warnings and Safety Recommendations as well
as general product information.
INTRODUCTION
AND
GENERAL FEATURES AND DISPLAYS

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INTRODUCTION
Welcome to OCEANIC and thank you for choosing the GEO !
It is extremely important that you read this Operating Manual in sequence and
understand it completely before attempting to use the GEO as a dive computer.
It is equally important that you read the Oceanic Dive Computer Safety and
Reference Manual (Doc. No. 12-2262) provided with your GEO. It contains
information that you must become familiar with prior to diving with your GEO.
Remember that technology is no substitute for common sense, and a dive computer
only provides the person using it with data, not the knowledge to use it.
INTERACTIVE CONTROL CONSOLE
The Interactive Control Console consists of four Control Buttons that allow you to
select mode options and access specific information. They are also used to link
the Transmitter(s), enter Settings, activate the Backlight, and acknowledge the
Audible Alarm.
Throughout this manual they will be referred to as the M, S, L, and A buttons.
 Upper/Left - Mode (M) button
 Upper/Right - Select (S) button
 Lower/Right - Light (L) button
 Lower/Left - Advance (A) button
M
A
S
L