Favor Dive Computer

Instruction Manual

by Suunto

Quick Reference Guide

Arrows:

Decompression Stop at the Ceiling Depth

Ascent Recommended

Must Descend

Ascent Rate Indicator

Current Time Display

Surface Interval/No Flying Time

No-Decompression Time

Ceiling Depth/Total Ascent Time

Common Contact

Temperature

Dive Counter

Maximum Depth During Diving

Day of the Month

Multifunctional Bar Graph

Mode Indicator

Battery Power Indicator

Reverse No-Decompression Time

Present Depth

Maximum Depth (at the Surface)

Fast Ascent Warning (SLOW)

Average Depth in the Logbook

Time Display/Mode Selection Contact

Personal Adjustment/High Altitude Mode

Activation/Dive Planning Contact

Low Battery Warning

Dive Time Month

The Suunto Favor Dive Computer Features:

Definition of Warnings, Cautions and Notes

Throughout this manual, special references are made when deemed important. These classifications are used to separate these references by the order of importance.

! WARNING !
READ THIS MANUAL!

Carefully read this instruction manual in its entirety, including Section 1, "For Your Safety". Make sure that you fully understand the use, displays and limitations of the FAVOR dive computer.

! WARNING !
NO DIVE COMPUTER WILL PREVENT THE POSSIBILITY OF
DECOMPRESSION SICKNESS (DCS)!

All divers must understand and accept that there is no procedure or dive computer that will totally prevent the possibility of a decompression accident. For example, the individual physiological make-up can vary with an individual from day to day. The dive computer cannot account for these variations. As an added measure of safety, you should consult a physician regarding your fitness before diving.

! WARNING !
ONLY DIVERS TRAINED IN THE PROPER USE OF SCUBA EQUIPMENT
SHOULD USE THE FAVOR!

No dive computer can replace the need for proper dive training.

! WARNING !
NOT FOR PROFESSIONAL USE!

SUUNTO dive computers are intended for recreational use only. The demands of commercial or professional diving often expose the diver to depths and prolonged exposures including multi-day exposures that tend to increase the risk of decompression sickness. Therefore, Suunto specifically recommends that the FAVOR not be used for commercial or other severe diving activity.

! WARNING !
PERFORM PRECHECKS!

Always check the FAVOR before diving in order to ensure that all LCD segments are completely displayed, that the FAVOR has not run out of battery power, and that the personal/altitude adjustment mode is correct.

! WARNING !
USE BACK-UP INSTRUMENTS!

Make certain that you use back-up instrumentation including a depth gauge, submersible pressure gauge, timer or watch, and have access to decompression tables whenever diving with the FAVOR.

Table of Contents

INTRODUCTION QUICK REFERENCE GUIDE 2
1. FOR YOUR SAFETY 10
2. GETTING ACQUAINTED WITH THE FAVOR
3. DIVING WITH THE FAVOR
4. MENU BASED MODES
  1. CARE AND MAINTENANCE
52
  1. TECHNICAL DESCRIPTION
55
  1. WARRANTY
63
  1. GLOSSARY
64

INTRODUCTION

Congratulations on your choice of the SUUNTO FAVOR Dive Computer. The FAVOR is a compact and sophisticated dive instrument that will give you years of trouble free and joyful diving. The FAVOR dive computer will provide you with important information that you will need during, between, and after your dives.

KEY FEATURES

The FAVOR monitors and reports vital information such as your five time, current depth, maximum depth, no-decompression time and ascent rate.

The FAVOR will also give you information, if through carelessness or emergency you are forced to exceed the no-decompression limits for any dive.

The FAVOR has a build-in calendar and clock. It features versatile logbook memory capabilities and long-term historical data. The instrument can be adjusted for diving at different altitudes or to add an extra level of conservativeness if desired.

The screen is protected against scratches and damage by a replaceable shield.

The FAVOR is available either as a wrist unit with an optional protective shield bot or mounted in a two gauge or three gauge console or in a hose mounted boot. The modular construction allows for the separate compass module to be attached to the two gauge console at the later stage.

METRIC AND IMPERIAL UNITS

All examples in this manual are shown in imperial units (i.e. feet and Fahrenheit). The corresponding imperial units are shown in brackets. The FAVOR is also available with metric units (meters and Centigrade).

! WARNING !
VERIFY THAT THE UNITS OF MEASURE WHETHER METRIC OR IMPERIAL,
ARE CORRECT BEFORE STARTING TO DIVE?

Any confusion resulting from improper selection of units may cause the dive to commit errors that my lead to serious injury.

1. FOR YOUR SAFETY

Always remember that THE DIVER IS RESPONSIBLE FOR HIS OR HER OWN SAFETY!

When used properly the FAVOR is an outstanding tool for assisting properly trained, certified divers in planning and executing standard and multi-level sport dives, with the described no-decompression limits. It is NOT A SUBSTITUTE FOR CERTIFIED SCUBA INSTRUCTION including training in the principles of decompression.

DO NOT attempt to use the Suunto FAVOR with reading this entire Instruction Manual. If you have any questions about the manual or the FAVOR, contact your Suunto dealer before diving with the FAVOR.

BACK-UP INSTRUMENTS

! WARNING !
USE BACK-UP INSTRUMENTS!

Make certain that you use back-up instrumentation including a depth gauge, submersible pressure gauge, time or watch, and have access to decompression tables whenever diving with the FAVOR.

SHARING THE FAVOR

! WARNING !
THE FAVOR SHOULD NEVER BE TRADED OR SHARED BETWEEN USERS
WHILE IT IS IN OPERATION!

It's information will not apply to someone who has not been wearing it throughout a dive or sequence of repetitive dives. Its dive profile must match that of the user. If it is left on the surface during any dive, it will give inaccurate information for subsequent dives.

No dive computer can take in account dives made with the computer. Thus any diving activity 48 hours prior to initial use of the computer may give misleading information and must be avoided.

PERSONAL/HIGH ALTITUDE ADJUSTMENT

More information about this is given in Section 3.5, "Personal adjustment and High Altitude Divers".

! WARNING !
SET THE CORRECT PERSONAL/ALTITUDE ADJUSTMENT MODEL

When diving at altitudes greater that 2300 ft [700 m] the personal/altitude adjustments feature must be correctly selected in order for the computer to calculate no-decompression status. The diver should also use this option to make the calculation more conservative, whenever it is believed that factors which tend to increase the possibility of decompression sickness exist (see Section 3.5). Failure to properly select the personal/altitude adjustment mode correctly will result in erroneous data and can greatly increase the risk of decompression sickness.

! WARNING !
THE FAVOR IS NOT INTENDED TO USE A ALTITUDES GREATER THAN
8000 FT [2400 M]!

Diving at altitudes above this limit may significantly increase the risk of decompression sickness.

When diving at higher altitudes (above 2300 ft/70 m), it is essential that the entered altitude mode, i.e. maximum altitude limit of the FAVOR, exceeds or is equal to the altitude of the dive site. The altitude mode indicator must show either A1 or A2, depending on the altitude. More information about this is given in Section 3.5, "High Altitude Divers and Personal adjustment".

DECOMPRESSION DIVES

! WARNING !
DO NOT USE THIS INSTRUMENT TO CONDUCT DECOMPRESSION DIVES!

Suunto does not recommend this instrument to be used to conduct decompression dives. However, if through carelessness or emergency a diver is forced to exceed the no-decompression limits on a dive, the FAVOR will provide decompression information required for ascent. After this the FAVOR will continue to provide subsequent interval and repetitive dive information.

EMERGENCY ASCENTS

In the unlikely event that the FAVOR malfunctions during a dive, follow the emergency procedures provided by your certified dive training agency or, alternatively, immediately ascent at a rate slower than 33 ft/min [10 m/min] to a depth between 10 to 20 feet [3 and 6 meters] and stay there as long as your air supply will safely allow.

HIGHER RISK DIVE PROFILES

The user must understand that all decompression devices (decompression tables and/or dive computers) are based on mathematical models and that many experts are currently concerned that these models may no under certain conditions adequately describe the physiological phenomena. These conditions are presently identified as dives which incorporate the following (Fig. 1.1):

!WARNING !
THE PRACTICES WHICH INCLUDE THE ABOVE DESCRIBED "HIGHER RISK DIVE
PROFILES" ARE BELIEVED TO INCREASE THE RISK OF DECOMPRESSION SICKNESS
AND AS SUCH CONSIDERED POTENTIALLY DANGEROUS AND SHOULD BE
AVOIDED EVEN IF THE CONFORM TO THE MATHEMATICAL MODEL!
! WARNING !
DO NOT USE THE FAVOR WITH NITROX MIX!

The mathematical tissue calculation model of the FAVOR has been designed for use with standard breathing air only (approximately 21% oxygen and 79% nitrogen by volume). Therefore, the FAVOR must not be used for diving with "Nitrox" or other mixed gases.

Fig 1.1 HIGHER RISK DIVE PROFILES (to be added later during graphic insertions)

Fig 1.2 RECOMMENDED PROFILE (to be added later during graphic insertions)

DIVE COMPUTER LIMITATIONS

While the FAVOR is based on current decompression research and technology, the user/diver must realize that the computer cannot monitor the actual physiological functions of an individual diver. All decompression schedules currently known to the authors, including the U.S. Navy Tables, are based on the theoretical mathematical model which is intended to serve as a guide to reduce the probability of decompression sickness.

The mathematical model uses as ascent rate of 33 ft/min [10 m/min]. Therefore it is critical that a proper ascent rate is always used.

The reader/diver is forewarned that individual physiological differences, severe environmental conditions and pre-dive activities, especially those which tend to increase dehydration, may increase the risk of decompression sickness.

As a safety precaution Suunto recommends that divers using the FAVOR should maintain no less that 10 minutes no-decompression time remaining at all times during the dive. This is especially important for divers in poor physical condition, in cold water or other arduous conditions.

Historically divers have been advised to always include a margin of safety in the diving activities. Suunto supports these practices and strongly recommends that the diver made the deepest portion of the dive near the beginning of the dive and gradually progress into shallower depth, allowing time for a 3 to 5 minute "safety stop" at a depth range of 10 to 20 feet [3 to 6 meters]. This is believed to be effective in further reducing the risk of decompression sickness.

Furthermore, the reader/diver is advised that any dive carries some risk of decompression sickness and neither the authors, nor SUUNTO OY will assume any responsibility or liability for accidents or injuries which might occur for any reason.

2. GETTING ACQUAINTED WITH THE FAVOR
! WARNING !
READ AND UNDERSTAND THE ENTIRE OWNER'S
MANUAL BEFORE DIVING!

Failure to complete this step may result in serious personal injury.

The purpose of this section is to provide the user with initial information to preview the operation of the computer. Since this information is limited, it is imperative that you read and understand the entire owner's manual before attempting to dive.

2.1 WATER CONTACTS

The FAVOR has three water contacts on the face of the instrument:

On the surface the FAVOR is operated by simultaneously touching the COM contact and one or two of the other contacts. When doing this, your finger tips should be wet or moist to establish the necessary electric contact. When submerged these contacts are automatically connected by the conductivity of the water.

2.2 ACTIVATION

The calendar clock is always shown on the display, when the dive computer is deactivated. In this mode the power consumption of the FAVOR is minimal.

The FAVOR is activated by touching the PLAN/ON [LR] and COM [LEFT] contacts (Fig 2.1). The first display, the STARTUP, shows all available elements and immediately after this the battery power indicator. A few seconds later the READY display with appear, showing zero values (Fig 2.2).

At this time, perform a pre-check making sure that the FAVOR operates correctly, that the low battery indicator is not on and that the personal/altitude adjustment setting is correct.

If the battery symbol is displayed the FAVOR should not be used (Fig. 2.3).

Fig. 2.1 ACTIVATION (no graphic available)

Touch the PLAN/ON and COM contacts with moistened fingers.

Fig. 2.2 READY DISPLAY (no graphic available)

Fig. 2.3 BATTERY WARNING (no graphic available)

The battery symbol indicates that the battery is too low for diving.

3. DIVING WITH THE FAVOR

This section contains instructions on how to operate the FAVOR and interpret its displays. Each display has been carefully designed to provide important information you will need to plan your dive or dive series.

You will find that the FAVOR is easy to use and read. Each display shows only the data relevant to that specific diving situation. For example, while you are on a dive, surface interval data is irrelevant and therefore not shown. On the other hand, while you are on the surface after a dive, remaining no-decompression time for that dive is irrelevant and therefore replaced with information for your next dive.

3.1 USE OF WATER CONTACTS

As described in Section 2.1, "Water Contacts", the FAVOR is controlled with the COM [LEFT], PLAN/ON [LR] and TIME/MODE [UR] contacts (Fig 3.1), as follows

Activation: touch the PLAN/ON [LR] and COM [LEFT] contacts.

Dive planning: once the FAVOR has been activated, touch the PLAN/ON ON [LR] and COM [LEFT] contacts.

Clock: once the FAVOR has been activated, touch the TIME/MODE [UR] and COM [LEFT] contacts for two seconds. The time is displayed for four seconds.

When the TIME/MODE and COM contacts are touched for over three seconds, the display will start to scroll through the following modes. Lift your fingers when the desired mode is display.

Logbook memory: at LOG the logbook memory is accessed.

Dive history memory: at HIS the history memory is access.

Personal/altitude

adjustment setting: at Alt the personal and/or altitude adjustment can be set.

Time setting: at Set the time and date can be adjusted.

Return: you can at any time exit the above modes by touching all three contacts at the same time. First make contact between the PLAN/ON and TIME/MODE contacts, e.g. by covering both contacts with your right thumb. Without lifting your right thumb, touch the COM contact with your left thumb. Alternatively, you can exit the modes simply by submerging the FAVOR in water.

You may sometimes encounter problems in using the contacts, or the FAVOR may activate on its own. The reason for this is probably contamination or invisible marine growth that may create an unwanted electric current between the water contacts. It is therefore important the FAVOR be carefully washed in fresh water after the day's diving is complete. The contacts can be cleaned with a soft pencil eraser.

3.2 BEFORE DIVING
  1. Activation, Pre-checks and Battery Warning

The FAVOR is always ready for use and will activate if submerged. However, it is necessary to turn it on before diving to check the personal/altitude adjustment setting, battery power, et. This is done, either by immersing it in water for a couple of seconds or by connecting the PLAN/ON and COM contacts with your fingertips.

When deactivated the time display is always shown. Once activated all display elements will turn on (showing mostly figure 8's and graphical elements) (Fig. 3.2). A few seconds later the batter power bar graph is shown (Fig. 3.3). Next, the screen will alternate between two READY displays, confirming that the activation is complete (Fig. 3.4). At this time, perform your pre-check making sure that:

The FAVOR is now ready for diving. If the FAVOR is not taken on a dive after activation, it will automatically switch off to the time display in 10 minutes to conserve the battery power.

Fig. 3.2 STARTUP I (no graphic available)

All segments shown.

Fig. 3.3 STARTUP II (no graphic available)

Battery power indicator. When two or less bar graph segments are shown the FAVOR should not be used for diving.

The FAVOR does not need to be reactivated for repetitive dives. It will remain active until is has calculated that all residual nitrogen has off-gassed. This may take up to 48 hours, as described in Section 6.1, "Operating Principles".

PERSONAL ADJUSTMENT AND HIGH ALTITUDE DIVING

! WARNING !
SET THE CORRECT PERSONAL/ALTITUDE
ADJUSTMENT MODE!

When diving at altitudes greater that 2300 ft [700 m] the personal /altitude adjustment feature must be correctly selected in order for the computer to calculate no-decompression status. The diver should also use this option to make the calculations more conservative, whenever it is believed that factors which tend to increase the possibility of decompression sickness exist (see Section 3.5). Failure to properly select the personal/altitude adjustment mode correctly will result in erroneous data and can greatly increase the risk of decompression sickness.

Fig. 3.4 READY DISPLAYS (no graphic available)

The maximum depth and dive time are zeros (as no dives have yet been made), the surface interval time is 0 hours 8 minutes (0:08) (in this case eight minutes after activation), the temperature is 72 degrees F [22 degrees C] and the present depth is 0 ft [0.0 m]. The personal/altitude adjustment mode is A1. The depth display will alternate between present and maximum depth. The Low Battery Warning (battery symbol) indicates the battery is too low for diving.

! WARNING !
THE FAVOR IS NOT INTENDED FOR USE
AT ALTITUDES GREATER THAN 8000 ft [2400 m]!

Diving at altitudes above this limit may significantly increase the risk of decompression sickness.

If you are diving at higher altitudes, make sure that the altitude mode has been set according to the altitude of your dive site.

For information on how to select the correct altitude setting and how to use the personal adjustment, see Section 35, "Personal Adjustment and High Altitude Dives".

BATTERY POWER INDICATOR AND LOW BATTERY WARNING

The FAVOR has a unique visual Battery Power Indicator designed to give you and advance notice of impending need to change the battery.

The Battery Power Indicator will always be seen during activation. The following table 3.1 shows the various warning levels (see also Fig. 3.3).

TABLE 3.1 BATTERY POWER INDICATOR

Battery Voltage Display after activation Operation Figure
over 3.0 V five bar graph segments normal, new battery 3.3a
3.0 V … 2.9 V four bar graph segments normal 3.3b
2.9 V … 2.8 V three bar graph segments battery change is recommended 3.3c
2.9 V … 2.7 V two bar graph segments don't dive, change the battery 3.3d
less than 2.7 V one bar graph segment don't dive, after three more activations the computer stays deactivated until the battery has been replaced 3.3e

After activation the Low Battery Warning is indicated by the battery symbol.

If the battery symbol is displayed in the surface mode or if the display is faded or weak, the FAVOR should not be used (Fig. 3.4). It indicates that the battery is too low to operate the FAVOR. If the low battery symbol appears during a dive, you should abort the dive and begin ascent to the surface.

NOTE: Temperature affects the battery voltage. If the FAVOR is stored at temperatures below freezing point, the low battery warning may be displayed even though the battery has enough capacity in warmer conditions. Make sure that the low battery warning disappears before diving.

  1. Dive Planning

It is possible at any time on the surface to enter the DIVE PLANNING mode, simply by touching the PLAN/ON and COM contacts. The display will rapidly cycle through the no-decompression limits for various depths from 30 ft [9 m] to 150 ft [45 m] in 10 ft [3 m] increments (Fig. 3.5). It takes about 45 seconds to run through the complete cycle, after which the FAVOR will automatically return to the READY display.

Higher personal/altitude adjustment modes will shorten the no-decompression time limits. These limits at different personal/altitude adjustment mode selections are shown in Tables 6.1 and 6.2 in Section 6.1, "OPERATING PRINCIPLES".

Fig. 3.5 DIVE PLANNING (no graphic available)

The no-decompression time limit at 100 ft [30.0 m] is 14 minutes in A1 mode.

DIVE NUMBERING SHOWN DURING DIVE PLANNING

Several repetitive dives are considered to belong to the same repetitive dive series when the FAVOR has not deactivated itself. The first dive of the series will be numbered ad DIVE 1, the second as DIVE 2, the third as DIVE 3, etc. (Fig. 3.6). When the surface time has been less than 10 minutes, the dives are considered to be the same. The dive number will not change for the second part of such a dive and the dive time will start where it left off.

  1. Calendar Clock Function

The calendar clock is always shown on the display, when the FAVOR is deactivated.

Once the FAVOR is activated the TIME display can be retrieved any time on the surface mode by touching the TIME/MODE and COM contacts for about two seconds. The current time and date will be shown for four seconds (Fig3.7).

When diving, the dive entry time and date is registered in the logbook memory. Remember always to check before diving that the clock is set, especially when traveling to different time zones. For adjusting the clock, refer to Section 4.4, "Setting Time and Date".

In the metric version of the FAVOR, the 24-hour time system is used.

Fig. 3.6 DIVE PLANNING (no graphic available)

The no-decompression time limit at 100 ft [30.0 m] is decrease to 5 minutes in A1 mode after the third dive of the series.

Fig. 3.7 TIME DISPLAY (no graphic available)

The time 10:30 [in case of imperial unit, A for a.m. and P for p.m. would be shown in the upper left corner of the display]. The date is 18.2 or February 18th. PLEASE NOTE: The date will always be displayed with the day of the month first, followed by the month.

3.3 DIVING
3.3.1 Basic Dive Data

The FAVOR will remain in the SURFACE mode at depths less than 6 ft [1.8 m]. At depths greater than 6 ft [1.8 m] the FAVOR will go into the DIVE mode.

Each piece of information on the display is clearly marked (Fig. 3.8). During a no-decompression dive, the following information will be shown:

In the lower left corner the following information will alternate:

Fig. 3.8 DIVING DISPLAY (no graphic available)

The present depth (d) is 63 ft [19.3 m], the no-decompression time limit (a) is 23 minutes in A1 mode (e) and the dive time (f) is 6 minutes. Maximum depth (b) during this dive 98 ft [29.8 m] and water temperature (c)64 degrees F [18 degrees C] are alternating in the lower left corner.

3.3.2 Reverse No-Decompression Time Bar Graph

The available no-decompression time is also shown visually in the multi-function bar graph in the bottom of the display (Fig. 3.9). When your available no-decompression time decreases below 60 minutes, the first bar graph segment appears. As your body absorbs more nitrogen, more segments start to appear.

Green Zone (a)

As a safety precaution Suunto recommends that divers using the FAVOR should maintain the no-decompression bar graph within the green zone.

Yellow Zone (b)

As all of the bars appear (yellow zone), your no-decompression limit is less than 10 minutes and you are getting very close to no-decompression limits. At this point, you should start your ascent towards the surface.

Fig. 3.9 REVERSE NO-DECOMPRESSION TIME BAR GRAPH (no graphic available, this is the bottom line of the computer display)

The first bar from the left appears when the available no-decompression time decreases below 60 minutes. The following bars appear, when the available no-decompression time decreases below 40, 30, 20 (green zone, a) and 10 minutes (yellow zone, b).

Fig. 3.10 ASCENT RATE INDICATOR (no graphic available, this is the [pivoted] graphic bar on the upper left corner of the computer display)

Pointer at position two: ascent rate 23 - 30 ft [7 - 9 m/min].

3.3.3 Ascent Rate Indicator

The ascent rate is show graphically with a pointer in the upper left corner, next to the notation ASC RATE (vertical written), as follows:

Ascent rate indicator Ascent speed Example in Fig. no.
No segments (no arm) Below 16 ft/min [6 m/min] Fig. 3.8
Segment one (arm at 150 degrees) 16 - 23 ft/min [5 - 7 m/min] Fig. 3.9
Segment two (arm at 120 degrees) 23 - 30 ft/min [7 - 9 m/min] Fig. 3.10
Segment three (arm vertical "MAX") 30 - 36 ft/min [9 -11 m/min] Fig. 3.11
Segment four (arm at 60 degrees) Above 36 ft/min [11 m/min] Fig. 3.12
Blinking "SLOW" Above 33 ft/min [10 m/min] Fig. 3.13

Fig. 3.11 ASCENT RATE INDICATOR (no graphic available)

Pointer at position three: ascent rate 30 - 36 ft/min [9 - 11 m/min].

Fig. 3.12 ASCENT RATE INDICATOR (no graphic available)

Pointer at position four: ascent rate is more than 36 ft/min [11 m/min]. Blinking SLOW displayed means that the ascent rate 33 ft/min [10 m/min] has been violated continuously. This is a caution to slow down!

The SLOW warning alternates with the current depth. The SLOW warning is an indication that the maximum ascent rate has been exceeded continuously, whereas the ascent rate indicator shows present ascent speed.

Whenever the SLOW warning appears, you should immediately slow down or stop your ascent until the warning disappears. You must not ascend shallower the 10 ft [3 m] with the SLOW warning on. If you reach the depth with SLOW on, you must stop at this depth and wait until the warning disappears.

! WARNING !
RAPID ASCENTS INCREASE THE RISK OF INJURY!

Do not exceed the maximum recommended ascent rate.

You must never surface with the SLOW warning on. If you do this, the warning will continue to flash until the unit deactivates itself in the normal manner. This may take up to 40 hours.

! WARNING !
DO NOT ATTEMPT TO DIVE FOLLOWING A SURFACE INTERVAL DURING
WHICH THE SLOW INDICATOR REMAINS ACTIVATED!

Violation of the maximum ascent rate may invalidate the calculations for the next dive.

NOTE: SUUNTO highly recommends a safety stop at the end of every dive in the range of 10 - 20 ft [3 - 6 m] for 3 - 5 minutes.

3.3.4 Visual Alarms

The FAVOR features visual alarms to alert you when you are approaching dangerous situations.

Potential danger situations during a dive, occurs when:

Immediate danger, happens when:

The permanent ERROR MODE is shown by a non-blinking Er in the center display. Once in ERROR MODE, the FAVOR will continue to display current depth and dive time. You should immediately ascend to a depth of 10 to 20 ft [3 to 6 m] and remain at this depth until air supply limitations require you to surface. When the surface has been reached, no further diving or flying should take place for a minimum of two days.

3.3.5 Decompression dives
! WARNING !
DO NOT USE THIS INSTRUMENT TO CONDUCT DECOMPRESSION DIVES!

Suunto does not recommend this instrument to be used to conduct decompression dives. However, if through carelessness or emergency a diver is forced to exceed the no-decompression limits on a dive, the FAVOR will provide decompression information required for ascent. After this the FAVOR will continue to provide subsequent interval and repetitive dive information.

Rather than requiring you to make stops at fixed depths, the FAVOR permits you to decompress within a range of depths.

BACKGROUND

When your NO DEC TIME becomes zero, your dive becomes a decompression dive, i.e. you must perform one or several decompression stops on your way to the surface. The NO DEC TIME on your display will be replaced by a flashing notation CEILING/ASC TIME (Fig. 3.13).

! WARNING !
YOU SHOULD ASCEND AND BEGIN DECOMPRESSION IMMEDIATELY WHEN
THE FAVOR SHOWS YOU THAT DECOMPRESSION IS REQUIRED!

Note the upward pointing arrow.

The ascent time (ASC TIME) is the minimum amount of minutes needed to reach the surface in a decompression dive. It includes: The time needed to ascend to the ceiling at an ascent rate of 33 ft /min [10 m/min]

plus

The time needed at the ceiling. The ceiling is the shallowest depth to which you should ascend

plus

The time needed to reach the surface after the ceiling has been removed.

! WARNING !
YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN
DISPLAYED ON THE FAVOR

The ascent time will increase if you:

These factors will also increase the amount of air required to reach the surface.

Fig. 3.13 DECOMPRESSION DIVE, BELOW THE CEILING ZONE (no graphic available)

The minimum ascent time is 4 minutes. The upward pointing arrow tells you to ascend. The ceiling is at 10 ft [3 m].

Fig. 3.13 DECOMPRESSION DIVE, AT THE CEILING ZONE (no graphic available)

The two arrows (a) point at each other ("hour glass"). You are at the ceiling zone at 11 ft [3.5 m] (c) and your minimum ascent time is 3 minutes (d). The ceiling is at 10 ft [3 m] (b).

! WARNING !

NEVER ASCEND ABOVE THE CEILING!

You must not ascend above the ceiling. In order to avoid doing so by accident, you should stay slightly below the ceiling. The ceiling zone is the shallowest depth range to which you should ascend when in decompression.

DISPLAY BELOW CEILING ZONE

The CEILING/ASC TIME symbol and upwards pointing arrow indicate that you are below the ceiling zone (Fig. 3.13). You should start your accent immediately.

DISPLAY AT CEILING ZONE

When you reach the ceiling zone, the display will show you two arrows pointing toward each other (the "hour glass" icon, Fig 3.14). The two arrows pointing toward each other will be shown between the minimum ceiling and 6 ft [1.8 m] below the minimum ceiling. All decompression stops must be performed at or below the ceiling depth range.