What is RoxAnn Swath?
RoxAnn Swath is a complete system which generates acoustic pulses, receives echoes and identifies seabed types.
How many Component Parts are there?
RoxAnn Swath has one main box which contains the transmitter and processor and a smaller box which contains the compass pitch and roll sensor. The transducer is supplied on a 1m mounting pole and has a 10m cable.
How is it connected?
RoxAnn Swath has three cables.
- Power Input:-240VAC
- Transducer cable which is has seven two-core individually screened cable which connects to each of the seven transducers
- RS232 from RoxAnn to computer
What is the Frequency of operation?
Nominal 200kHz
Is RoxAnn Swath limited to any range?
RoxAnn Swath is best used in minimum 5m water depth up to a maximum of 60m.
Is the Power Supply for RoxAnn important?
Standard ships supply is normally good enough. However care must be taken when fitting to noisy supplies or those prone to excessive voltage levels.
What does RoxAnn Swath Output?
RoxAnn Swath outputs an ASCII data string comprising depth, first echo and second echo from each of the seven echosounder transducers
How long does it take to install?
Depending on the vessel from 2 hours to 1 day.
Is specialised equipment required?
No.
What skills are required?
The ability to use a soldering iron and to mount the transducer securely.
At Installation is there a calibration required?
Yes - This is because every echosounder, transducer and installation is different and RoxAnn must be set-up to take account of these differences. In effect, calibration is achieved by taking the vessel to open water and pressing the 'calibration' switch on the rear panel of the RoxAnn.
How often do I have to calibrate?
Once, and the results are saved in software.
What does the computer do?
The computer which receives the output from RoxAnn, runs the software which collects, saves, displays and processes results from RoxAnn.
What are these results?
Depth, first echo (E1), second echo (E2).
What is E1?
E1 is a digital indicator of seabed roughness. The lower the value the smoother the material, the higher the value the rougher the material.
What is E2?
E2 is a digital indicator of seabed hardness. The lower the number, the softer the material; the higher the number, the harder the material.
Where are E1 and E2 derived?
E1 is derived from the first (main) echo from the echosounder transmission. E2 is derived from the second (first multiple) echo.
Why is RoxAnn unique?
The technique for deriving roughness and hardness from E1 and E2 is patented on a world-wide basis, following invention of RoxAnn in 1980.
Does RoxAnn have pitch and roll stability?
Yes, RoxAnn uses information from the compass sensor and information from the pitch and roll sensor to position each of the seven transducer beams along the course in the correct location.
How are RoxAnn results displayed?
RoxAnn results are combined with positioning data from a (D)GPS and are plotted on a chart. The most commonly used software package is RoxMap, but other packages such as Hypack can be used especially when data from a number of sensors are being collected for post-processing.
What types of Materials have been identified by RoxAnn?
This list shows the variety of materials that have been identified by RoxAnn: Algae's, Burnt Oil Residue, Clay Non-Cohesive, Coal, Coarse Sand, Cohesive Clay, Corals, Crabs, Crayfish, Debris, Drilling Cuttings, Drilling Fluids, Eel Grass, Fine-Sand, Gravel, Gravel/Clay Substrate, Lobsters, Molluscs, Mud, Mussels, Oil Residue, Patch Reef, Pipelines, Rock, Flat Rock, Rough Rock, Bed Rock, Scallops, Sea Urchins, Seagrass-dying, dead, mature, new growth, Searmarl, Seaweed, Silt, Starfish, Trees & Logs (Underwater), Weathered Rock, Weed Densities, Weed on Rock, Wrecks.
What industries use RoxAnn?
The following list gives an indication as to the variety of industries that RoxAnn can be used in so far:Biological Monitoring, Crayfish, Debris Clearance, Defence, Diamond Hunting, Dredging Environmental Control, Fisheries Research, Fishing, Ground Fisheries, Hydrographic, Lobster Fisheries, Mine Counter Measures, Mapping, Mineral Resource, Monitoring, Oil Industry, Oil Spill Response, Pelagic Fisheries, Pipeline Route Surveys, Prawn Fisheries, Shell Fisheries,Surveys, Wreck Hunting.
