Strumenti RON

Triaxys

Mooring Requirements
The TRIAXYS™ Directional Wave Buoy has special mooring requirements, which need to be observed to achieve maximum performance. The key feature required is the need to de-couple the mooring from the buoy to allow unrestricted buoy motions in wave fields. The de-coupling is accomplished either by operating the TRIAXYS™ buoy in an untethered free-floating configuration, or by use of a compliant mooring section. The compliant mooring section is composed of a special extruded 32 mm (1.25”) rubber cord, 15 m in length, terminated with stainless steel compression fittings. The elastic nature of the compliant component allows the TRIAXYS™ buoy to follow waves in an unrestricted fashion. The compliant section is usually attached directly to the buoy (see mooring diagrams that follow). The mooring connection to the buoy should be made with a 12 mm stainless steel swivel. The swivel reduces the chance that the mooring will become fouled in the presence of rotary tidal currents. There are no requirements for external ballast as the buoy’s internal batteries provide the proper dynamic stability for the buoy’s operation. The balance of a TRIAXYS™ mooring requires the following:

For depths of up to 75m, a simple means to calculate the component lengths are as follows:

• Mooring Depth (m) x 2 = total mooring length (TML)
• TML – compliant mooring segment (15 m) = residual mooring length (RML)
• RML / 2 = length of each polypropylene line and nylspin™ components (Note: nylspin™ is an anti-torque nylon coated wire.)

The polypropylene line is lifted off the bottom to prevent any accelerated wear by using auxiliary floatation on the lower segment of the mooring. By virtue of the neutrally buoyant compliant section and the positively buoyant polypropylene line, the design of this mooring will not add any residual weight to the buoy. The only vertical weight component added to the buoy is from current drag on the buoy and mooring. Another consideration that must be taken into account is that mooring components must be selected to ensure they are electrolytically and mechanically compatible. Isolation of dissimilar metals is imperative to prevent galvanic corrosion that will cause premature mooring failure. This can be accomplished by using “like materials” (e.g., SS 316 with SS 316) or isolation bushings (e.g., nylon thimbles) to prevent contact of dissimilar materials. For long-term deployments the use of anodes on metal components is recommended. Shackle sizes should be chosen so that safe working loads are not exceeded during deployment and recovery operations, as well as for wear factors during deployment.

Scarica gli allegati

PDF 20-30m Triaxys Mooring.pdf

PDF 50-100m Triaxys Mooring.pdf

PDF 100-150m Triaxys Mooring.pdf

Scheda Tecnica

Diameter:	0.9m (36")
Weight (Including 4 Batteries):	197 Kg (435 lbs) 90 Kg (199 lbs)
Weight (WITHOUT BATTERIES):	3 accelerometers; 3 rate gyros; 1 flux-gate
Sensors:	Compass
HEAVE	± 20 m
Range:	1 cm
Resolution:	better than 2%
Accuracy:	1.6 - 30 seconds
Period:	&nbps;
DIRECTION:	0-360°
Range:	1.6 - 30 seconds
Accuracy:	±1°
Period:
SEA SURFACE TEMPERATURE:	-5 to +50°C
Range:	0.1°C
Accuracy:	Amber, 3 nautical mile visibility, ODAS sequence
Obstruction Light:	-30 to + 60°C
Operating TemperatureE Range:	-40 to +70°C
Storage/Transit Temperature:	4Hz
Sampling Frequency:	Multiple transmissions of each data set; Directional
Standard Data Transmission:	Wave characteristics and spectra; Extensive wave statistics; Sea surface temperature; Battery
REAL TIME DATA PROGRAMMABLE CONFIGURATION:	VHF or ARGOS
Transmission Options:	30-39 MHz or 39-50MHz; synthesized frequency
VHF Transmitter:	Selection 3 watts @ 12 VDC; VHF Range up to 10 nautical
Transmitter Power:	Miles 4 gel cells
Batteries:	10 @ 6 watts
Solar Panels:	GPS/ARGOS (optional)
Position: