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Zunibal Drifting Buoy Z-Sphere (SVP)

Manufacturer: Zunibal

Availability: Usually ships in 1 week

Z-Sphere is a small and compact drifter marker buoy, can also be used as a Surface Velocity Program (iSVP) drifting buoy, it is equipped with bi-directional Iridium satellite telemetry which, when coupled with back-office data presentation services such as those offered by ZUNIBAL, provide the user with real-time data location and tracking information, essential for SAR and spill tracking operations. The new Z-Sphere is powered by solar cells which means the running time is theoretically unlimited.

Price: $1,535.00

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The Z-Sphere mini Buoy is a small and compact tracking & monitoring buoy based on Iridium satellite system. This buoy can be tailored to suit a wide range of applications as surface drifter to track sea currents, oil spills and rescue operation between others. It can also be used as a Surface Velocity Program (SVP) drifting buoy.
The Surface Velocity Program (iSVP) drifting buoy is a Lagrangian current-following drifter, designed to track water currents (15 metres depth) beneath the ocean surface.
The modern drifter is a high-tech version of the "message in a bottle". It consists of a surface buoy and an optional subsurface drogue (sea anchor), attached by thin tether. The buoy measures temperature and other properties, and has a transmitter to send the data to passing satellites.


  • Surface currents tracking (Surface Velocity Program)
  • Iceberg tracking
  • Oil spill tracking
  • Container tracking
  • Early detection of sludge in marshes
  • Oceanographic and marine environmental data gathering
  • Discrete marker buoy
  • Search and rescue distresses vessel marker
  • Aquaculture
  • Academic researches
  • Argo telemetry


  • Easy to deploy
  • Compatible with SVP’s holey sock drogue
  • High luminosity LEDs for its localization 
  • Magnetic On/Off switch 
  • Rechargeable battery 
  • Fully solar powered 
  • Unlimited running time
  • No battery chargers needed 
  • Water temperature sensor 
  • 2 years of warrantee 
  • Worldwide Coverage by Iridium 
  • Customized frecuency transmission
  • Encrypted messages, maximum security 
  • GNSS receiver 
  • High accuracy GPS 
  • Trinity Ocean Watcher Controller for data acquisition and processing system 
  • No need of any additional accessories. 
  • Maintenance free 
  • Low-cost communications plan
  • Adaptive design: position of the buoys on PC, Tablet and Smartphone. 
  • Operating temperature 0ºC - 45ºC


  • The Z-Sphere satellite-tracked surface drifting buoy ("drifter") is a low-cost small oceanic Lagrangian device to track sea currents based on Iridium communication network.
  • The position is obtained by a GPS module, and it has a IRIDIUM satellite data transmission system.
  • The Iridium® modem provides the end-user with lower transmission costs and an increase in data throughput.
  • The sampling frequency and transmission frequency are configurable by Zunibal before ordering or later in remote mode.
  • The Z-Sphere has a small diameter, only 31,2 cm and its low weight of 7,5 kg makes the whole system very user freindly for deployment and recovery.
  • Its 14,6 liter volume allows the use of a SVP´s holey sock drogue.
  • Its solar rechargeable energy system makes the running time theoretically unlimited.
  • The Z-Sphere accurately follows near surface currents and can be rapidly air/vessel deployed for Search & Rescue operations or to track spills etc.
  • The standard measurements are water temperature, GPS position/time and battery level.
  • The buoy is equipped with a highly reliable magnetic switch
  • Fully plastic buoy with a rubber protection around it for impacts absorption.


The Surface Velocity Program (SVP) drifting buoy is a Lagrangian current-following drifter, designed to track water currents (15 metres depth) beneath the ocean surface. Developed for unattended operation in the oceans of the world, the SVP consists of sensors to acquire meteorological and oceanographic data, a battery power source, and a satellite transmitter that relays the data through Iridium® satellite systems.
The standard SVP is equipped with a sea surface temperature sensor. The SVP’s holey sock drogue is centered at 15 meters and is sized to provide a drag ratio (drogue frontal area to that of all other submerged frontal areas) in excess of 40:1.
Additional sensors can be added. They include; barometric pressure (BP), salinity, and conductivity. The SVP buoy has been a proven data collection asset for the oceanographic, meteorological, and oil and gas markets. 


  • Diameter:  312 mm (9.48 inches)
  • Weight:  7.5 kg (3.08 pounds)
  • Volume: 14.6 lt
  • Depth rating: 200 m
  • Construction: Injection molded high impact ABS


  • Running time: unlimited
  • Battery: Lithium-ION
  • Communications: IRIDIUM modem
  • Positioning: GPS module
  • Power switch: Magnetic activated switch
  • Debug: Externally visible LED status
  • Sensors: Water Temperature
  • Operating temperature: 0ºC - 45ºC
  • Configuration: Transmission frequency (by Zunibal)
  • Logics:
    • Internal error management
    • Iridium coverage
    • GPS coverage
    • battery level


  • Communications: IRIDIUM 9602 SBD transponder
  • Data storage: Zunibal web server
  • Visualization: Web based tracking (on the Zunibal web acquisition and processing APP)
ZUNIBAL provides a limited warranty to the original purchaser against all defects in original workmanship and material under normal SCUBA use and service as outlined in the owner's manual for 2 years from the date of purchase, with the following exceptions and conditions:
  • This warranty does not cover rental use.
  • Should your equipment prove to be defective for any reason (other than those listed in the limitations section below) it will be repaired or replaced at ZUNIBAL´ discretion, free of charge, excluding shipping and handling charges.
  • Repairs made under this warranty will not extend the warranty period
  • This warranty is non-transferable and applies to the original purchaser only.
  • All correspondence concerning this warranty must be accompanied by a copy of the original sales receipt.
  • Any flood or damage, for any reason, that is caused from flooding an O-ring sealed or water tight area will not be covered under warranty. All O-ring sealed products undergo extensive factory pressure testing before being shipped and delivered and are therefore guaranteed to be sealed and functioning when shipped from the factory.
  • All batteries and chargers are warranted by the original battery/charger manufacturer.
  • Battery packs are warranted for 6 months.
  • ZUNIBAL nor ADITECH will not be liable for any loss, damages, or expenses including incidental or consequential damages directly or indirectly arising from the sale or use of the product.
  • All paint finishing, cosmetic discoloration of surfaces, powder coating, or material stitching that is chipped, damaged, or unthreaded through customer use is not covered in the warranty.
  • ZUNIBAL does not warranty any product for aesthetic finishes. Issues with surface finish that do not affect function of the product are not covered under warranty.
  • This warranty does not apply and may be rendered completely void in the event of accidental damage, abuse, overcharging of battery, flooding due to neglect, tampering, lack of care and maintenance, improper storage, or unauthorized service.
  • This warranty specifically excludes connectors, O-rings, fuses or other conditions resulting from misuse and negligence.
  • Modifications or repair by anyone other than an authorized ZUNIBAL Dealer or ZUNIBAL Service Department will void the warranty.
  • Each product is carefully examined and checked before it is shipped. It should therefore be visually and operationally checked as soon as it is received. If it is damaged in anyway, a claim should be filed with the courier and ZUNIBAL or ADITECH notified of the damage.
  • By purchasing this product you agree and understand that in no event will ZUNIBAL nor ADITECH, its distributors or retailers, be held liable for any personal injuries resulting from its operation, or any other damage whether direct, indirect, incidental or consequential, even if ZUNIBAL is advised of such damages.

NOTE: If the equipment is not covered by warranty, or if it is determined that the fault is caused by misuse, repair will be billed to the customer, and an estimate submitted for customer approval before the commencement of repairs