Monitoring from a stationary position
Oceanographic buoy / Boya oceanográfica
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The meteorological and oceanographic buoy has a toroid-shaped surface buoy, also called "Donut", holding various oceanographic and meteorological instruments along with a GSM (modem) for telemetry, data logger for data storage, GPS, and batteries charged by a set of photovoltaic panels through a charge controller.
Connections among the system components are done with neoprene rubber and polyurethane-jacketed cables and Sub Conn connectors.
The toroid-shaped buoy is helpful for holding instrumentation submerged near the surface, thus providing reliable measurements from shallower water layers.
Main features
- Active and passive signaling in accordance with regulations in force (Cruz de San Andrés, night flash, radar reflector, body painted yellow and indications of the property).
- Minimum buoyancy of 200 kg.
- Dimensions of Ø 2000 x 500 mm.
- Mast height of 2000 mm above sea level.
- Flotation Material: Dense polystyrene covered with fiberglass, 10 mm thick and high resistance.
- Structures and substructures are of stainless steel 316L.
- Zinc anodes for cathode protection to avoid salt-water corrosion, are interchangeable
- Waterproof room for storing batteries, data logger and additional electrical devices
- Ballast weight for keeping the buoy structure upright
- GPS
- Rechargeable battery and photovoltaic panels
- Data acquisition system (data logger)
- Telemetry system (GSM/GPRS)
Oceanographic instruments
 One SBE37 Microcat CT measures surface water temperature and salinity.
Two SBE 16 plus IM inductively coupled to the mooring cable at 25 and 50 m depth equipped with the following sensors:
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Temperature
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Salinity
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Dissolved Oxygen
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Irradiance (PAR)
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Turbidity
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Chlorophyll fluorescence
One Workhorse Monitor ADCP (Acoustic Doppler Current Profiler) that converts the backscattered sound into components of water current velocity in the upper 120 m water layer.
Meteorological instruments
A meteorological station consisting of a number of instruments to measure:
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