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SOFTWARE UPDATE REV Q - April 1, 2009 
GPS SPEED CONTROL
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EXPERIMENTAL SOFTWARE
October 3, 2008
What is Rev X?
 The Zero Off team has been listening to the voice of the waterski community and is committed to make every effort to provide the best pull for all types of skiers. Rev X addresses many of the concerns voiced by the waterski community and includes new screens, easier to use interfaces and more importantly several different letter and number options designed to optimize the pull for a broader range of skiers.Rev X is experimental software used for development purposes only. PLEASE NOTE: THIS IS NOT A REQUIRED UPDATE AND IS NOT TOURNAMENT APPROVED.

How do I get Rev X?
Rev X is available for download by request only. Users will be required to complete an application
and a download link will be emailed within 72 hours of recipt of application. The download link will have a 10 day expiration date. Please note: Rev X is not for public distribution and links/downloads should not be shared. Each applicant will be required to log information on the use of the software by email or online.  

What are the requirements to become an applicant and download Rev X?
1. Each applicant must posses a PC laptop with the current AquaStar display software and an eCom cable. (for more information about required hardware please see below)
2. Applicants must have the ability to properly update their own software. Zero Off will not replace or exchange Zero Off GPS speed control units that have Rev X software updates.
3. Each applicant will be required to log usage information, user functionality and preferences of all skiers are pulled by Rev X on the Rev X review form. Each review form must be submitted for review by the Zero Off development team.
4. Applicants must agree not to use Rev X in any tournament without formal written approval from AWSA.
5. Applicants must agree not to share or distribute Rev X software. Please note: All downloads are traceable and serialized for security.

How do I install Rev X?
1.       Download and follow the Reprogramming Instruction Manual

What is required to do this software update?
1.       PC laptop with Microsoft XP or Vista
2.       eCom cable -
Order an eCom cable
3.      
Download and Install the AquaStar display Software
4.       Download Rev X software

What are the Slalom "Pull Type" settings?
There are a total of nine slalom ‘Pull Type' settings. They are: A1, A2, A3, B1, B2, B3, C1, C2, and C3. Following is a brief review of how the system works and the information you need to select a setting.

Once the boat is stabilized at target speed, the primary factor causing it to deviate is skier loading and unloading. In response to a negative speed deviation (skier load), the engine increases rpm. Conversely, in response to a positive speed deviation (skier release), the engine decreases rpm. This rpm change varies in both rate and amount.

The settings of A, B, or C primarily determine the rate at which engine rpm is modified in response to speed deviations, while the settings of 1, 2, or 3 spread the load resulting from those rpm changes. At the same time, the system works to achieve its goal of maintaining the average speed down the course as close as possible to the target speed.

The best and most consistent results can be obtained by matching your skiing style with the system's programmed response to speed changes as shown below. A recommended strategy is to first select a letter, then a number. The types of pulls can be summarized as follows:

A - Slower engine response out of the buoy, but the boat will tend to move ahead as the skier approaches the buoy.
B - Moderate engine response compared to A and C.
C - Faster engine response out of the buoy, but the boat will tend to hold back as the skier approaches the buoy.

1 - Requires the lowest amount of load before the system initiates an rpm spread. This provides for a softer pull behind the boat.
2 - Provides for a moderate pull behind the boat as compared to 1 and 3.
3 - Requires the highest amount of load before the system initiates an rpm spread.

(Note: If you are new Zero Off user or not sure, a recommended starting setting is B2.)

(Note: If you are transitioning from a previous tournament approved version of Zero Off, use your letter + the number 3. For example, if you have been skiing with letter A, then use A3 in order to receive the most similar pull to the 2008 version. The same rule applies to B and C.

Examples of when a lower letter and/or number might be appropriate:

  • Skiers primarily concerned with getting the softest possible pull behind the boat.
  • Those who are light or lightly load the line.
  • Skiers who tend to break, overturn or have less than optimum body position out of the buoy.
  • Deep shortline skiing as a lower setting helps counteract the natural robust acceleration of the pendulum swing.

Examples of when a higher letter and/or number might be appropriate:

  • Skiers primarily concerned with being released from the boat coming into the buoy.
  • Those who are heavy or heavily load the line.
  • Skiers who tend to be in good skiing position out of the buoy.

Other considerations include strength, conditioning, proficiency, attempting a new line length, etc. Experiment with various settings to find out which works best for you.

Downloads for Rev X Introduction, Application, FAQ's & Review Form

A special thanks goes to Andy Mapple, Freddy Kreuger, Joe Grogan, Greg Badal, Andy Rose and everyone who contributed to the Zero Off Rev X test in California.


AquaStar, Inc. / Zero Off
6650 Highland Rd,
Waterford, MI 48327
Local: 1.248.886.0849
UK: 0151 324 1500
Email: sales@zerogps.com