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SeaHorse FAQ

Here is a list of some frequently asked questions regarding SeaHorse:
  1. What are the batteries for? Why do you need them if you harness wave energy?
    2.
  2. How long will the batteries last?
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  3. Is this performance dependent on sea state? If the sea state changes will the performance be different?
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  4. How long does it take to return to the bottom of the mooring?
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  5. Can I use my own instrumentation? What are the space and weight limitations?
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  6. How can SeaHorse accommodate different mooring wire sizes?
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  7. Can I use my own mooring wire?
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  8. What are the minimum and maximum depths of profiling?
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  9. You state a 200 m depth rating. Can the mooring be deployed in 500 m?
    10.
  10. How much will a complete SeaHorse system cost?
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  11. What is the delivery time for a SeaHorse system?
    12.
What are the batteries for? Why do you need them if you harness wave energy?
Batteries are required to operate the internal electronics of the SeaHorse only. These include the processor, the storage card and the internal pressure sensor. The climbing mechanism is a passive mechanical system and continues to operate after the system has gone into its programmed sleep mode.
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How long will the batteries last?
Battery life depends on many factors, including profile frequency, mooring depth and sensor configuration (some fluorometers have a heavy current draw.) To date, SeaHorse moorings have been deployed about 8 weeks. Battery life was still well within operating range after this period of time. Contact ODIM Brooke Ocean for an accurate battery life assessment.
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Is this performance dependent on sea state? If the sea state changes will the performance be different?
Climbing performance (the trip down the wire) is the only factor affected by sea state. Heavy seas will propel the SeaHorse down the wire much faster than calm seas. On the way up the wire, the stage where data is collected, the SeaHorse is in free float mode and rises at a steady rate of 0.5 m/s. At this stage, neither the length of mooring nor the sea state have any effect on its performance.
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How long does it take to return to the bottom of the mooring?
The time it takes to reach the bottom of the mooring depends on the length of the mooring and the wave height. The larger the wave, the faster the descent. A typical descent rate in an aggressive, steady sea state is 2-3 m/s.
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Can I use my own instrumentation? What are the space and weight limitations?
You can use your own instrumentation as long as it is Sea-Bird 19 / 19plus compatible or it is self-standing. A variety of instruments in a variety of shapes and sizes have been implemented on the SeaHorse. The SeaHorse is capable of carrying an additional payload of 11 lbs in-water weight, beyond the typical SeaHorse sensor package.
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How can SeaHorse accommodate different mooring wire sizes?
Different mooring wire sizes are accommodated by replacing the gripper "jaws" with ones of various sizes. Each size of jaw will work on only the wire size it is designed for.
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Can I use my own mooring wire?
SeaHorse must operate on a jacketed mooring wire as described by ODIM Brooke Ocean. As long as your cable and the terminations meet ODIM Brooke Ocean approval, you can use your own cable. Most customers have relied on ODIM Brooke Ocean to supply the mooring wire suitable for the application. A set of specially-designed stoppers are supplied as part of the SeaHorse system.
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What are the minimum and maximum depths of profiling?
The current SeaHorse profiler is designed for a maximum of 200m. The mooring can be of any length, but the profiler must be constrained to the top 200m of the water column. Due to the mooring configuration, moorings should be a minimum of 10-15m.
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You state a 200 m depth rating. Can the mooring be deployed in 500 m?
Yes, the mooring can be deployed in a 500m mooring. However, the SeaHorse must be constrained to the top 200m of the mooring. This is accomplished by shackling a 200m length of SeaHorse mooring wire to the top of a second length of mooring wire. The lower segment of the mooring wire need not be the special jacketed wire.
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How much will a complete SeaHorse system cost?
Each SeaHorse system is customized to the client's requirements, so a set price cannot be quoted on this site. Please contact salesrrc@rolls-royce.com with your complete list of mooring requirements and desired sensor suite.
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What is the delivery time for a SeaHorse system?
With the exception of some exotic sensors or mooring components, delivery time for a SeaHorse system is typically 12 weeks from receipt of your authorized purchase order. Please contact the ODIM Brooke Ocean Sales Department for a more accurate delivery schedule.
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ODIM Brooke Ocean is continually compiling a list of frequently-asked questions concerning the SeaHorse profiler and will be posting them on a regular basis.

In the meatime, please submit your questions and we will answer them on a one-to-one basis. Please send your questions to: salesrrc@rolls-royce.com

Thank You,
The SeaHorse Design Team

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URL: http://www.brooke-ocean.com/faq-seahorse.html (Last Updated: Aug 17, 2007)