Fluxgate Compass

Fluxgate Compass

Glossary of Marine Electronics

Autopilots The first self-steering gear was introduced in the 1920's to control model yachts but it was not until 1948 that the principle was applied to full scale yachts. Standing at the helm for lengthy periods, monitoring instruments and keeping a good look out can be very tiring. An autopilot relieves the helmsman from steering the correct course leaving him free to maintain a proper watch. The autopilot can be set to either steer a compass course or a course relative to the wind. A fluxgate compass or electronic wind indicator feeds information to a microprocessor which then makes the necessary rudder movements to return the vessel to it's required course. The mechanical power is applied to the rudder by either electric linear activators, hydraulic pumps or rotary drives. GPS/Chart plotters can be used to input navigational instructions to the autopilot.

Battery Chargers will keep batteries fully charged thereby extending their working life.

Chart Plotters Typically a chart plotter consists of an antenna, mounted high on the boat, to track GPS signals and a display unit sited either at the at the navigation station or the helm of the vessel. The vessels position is sent from the antenna to the display unit which in turn shows it graphically on the chart. The Chart itself will look similar to it's paper equivalent and show depth, land mass, navigational aids such as bouys and potential dangers in the form of wrecks and obstructions. The user can add way points to the chart and zoom in and out of the display. Chart plotters can be connected to drive an autopilot and/or send GPS data to a fish finder or radar. They can also interface with a laptop enabling complex passage planning to be done away from the boat and then entered into the chart plotter after arriving at the boat.

Magnetic Transmitting Compasses work like traditional compasses using magnets to determine the vessels orientation to the earth's magnetic field they then transmit the boats heading to an electronic display. They make steering easier than with conventional compasses because they display steadier headings and do not suffer from the "lag" that occurs when making a turn. They can interface with chart plotters, autopilots and radar. Fluxgate Compasses consist of two pieces of readily saturated magnetic material with coils wound round them in opposing directions. AC current is passed through the coils and the material is saturated in one direction and then the other. The earth's magnetic field affects slightly the time at which saturation occurs, earlier in one coil and later in the other. The difference is then calculated giving an output proportional to the earth's magnetic field. They are accurate to 0.1 of a degree. Their output can be displayed digitally to the helmsman or they can interface with autopilots, chart plotters and radar.

Echo Sounders work on the same principle as sonar. A transducer emits a narrow beam of  high frequency sound. This is reflected by any solid objects and the time between transmission and receipt of the echo is measured. The speed of sound through water is know and so the range or distance to the sea bed can be calculated. That is then displayed in metres. Forward Looking Sonar (FLS) enables you to see the underwater hazards before you're actually on top of them. A typical range for a FLS is 150 metres.

An Emergency Position Indicating Radio Beacon (EPIRB) is a piece of equipment designed to float free of a vessel in distress. It then sends a radio signal that can be detected by Search and Rescue Satellite Aided Tracking (SARSAT) satellites. They relay a message to a ground station that in turn can instigate a search and rescue operation.

Fish Finders use the same technology as sonar. A narrow beam of high frequency sound is transmitted by a transducer, this is reflected by solid objects such as the sea bed. By developing this technology fishfinders provide displays that show where the fish are and they can differentiate between bait fish and larger species

Global Positioning System (GPS Receivers) - This system was originally designed for military purposes and is owned and operated by the United States Department of Defence. 24 satellites are arranged in a "birdcage" around the globe, they are positioned in such a way that at any place on the earth's surface a direct line of sight can be established to a minimum of 4 satellites. A fix is obtained by measuring accurately the distance between a satellite and the GPS receiver at a precise time. Because the exact position of the satellite is known, these distances provide position lines which are converted by a microprocessor within the GPS receiver to read outs of latitude and longitude.

The log is used to measure the boats speed through the water. A paddle wheel or impeller, mounted below the waterline is turned by the flow of water, this generates electrical impulses that are fed to a microprocessor that displays both speed and distance run.

Inverters - On most boats today you will find domestic equipment of one sort or another. For on board entertainment there are televisions and stereo systems. With the popularity of chart plotters comes the PC or laptop. Maintenance often requires the use of power tools. Liveaboards might have a washing machine, dishwasher or microwave. Can take 12v, 24v or 48v supply and convert it to a stable 110 v or 220v AC supply.

Navtex can perhaps best be described as a continuously updated telex service providing navigation and weather information within specified areas. An on board receiver, tuned to 518kHz, the worldwide Navtex frequency, if left turned on will either print out or display the latest massages sent from a local station. The service is available up to 400 miles from the coast.

Radar enables you to see what otherwise would be invisible. They offer greatest benefit at night and in fog or rain and are of particular value when close to shore or in busy shipping lanes. They consist of an antenna and a display. The antenna sends out a stream of RF energy which is reflected back off hard objects. When this energy is bounced back it is converted to a signal which displayed to the user. The antenna rotates every few seconds, the display continuously calculates the direction of the antenna and so a precise bearing to the target is calculated. The time is measured for the energy to be reflected and so the distance of the target is also displayed.

Satellite Phones consist of an antenna, a modem and a normal handset. They are powered by an iridium battery. Their range is anywhere covered by in Inmarsat Mini-M satellite. Voice, fax, email and data can be transmitted.

Satellite TV requires an antenna and of course a television. Reception is available within a "footprint" which is based on EIRP (Effective Isotropic Radiated Power) of a transmitting satellite. The EUTELSAT together with the two ASTRA satellites cover Europe. NILESAT and the two ARABSATs cover Africa and the Middle East. Good coverage is also available in North, Central and Southern America.

SSB Radio has a range of several thousand miles. You will need an FFC license, or the equivalent in whichever country you plan to operate it. Power consumption is a consideration. Up to 100 Watts may be required for transmission. SSB radio requires several items of equipment. A transceiver capable of SSB operation, An antenna, this must be 8 metres long and in practice most boats use a backstay or shroud for the purpose having fitted the necessary insulators. An antenna tuner matched to the transceiver model. If you want to send email you will also need and radio modem and computer.

VHF Radio The power required to transmit is minimal, all sets have the option of transmitting on either 1 Watt or 25 Watts and the lower power should be used whenever possible. Unlike telephones that allow you to both talk and hear at the same time most VHF sets require you to press a transmit button prior to talking. This is known as simplex. Duplex sets are available but are much more expensive. VHF radio waves travel in straight lines so the aerial should be mounted as high as possible, preferably at the masthead.

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Raymarine M81190 Compass Fluxgate $216.71 Raymarine M81190 Compass Fluxgate

Clipper / Clipper Compass System w/Removable Fluxgate Sensor / CL-C $307.48 Clipper - Clipper Compass System w/Removable Fluxgate Sensor - CL-C

RayMarine M81190 Raymarine Fluxgate Compass Module $201.95 "Raymarine Fluxgate Compass Module, The Raymarine M81190 is a replacement fluxgate compass module for Raymarine autopilots and instruments. Originally supplied with all autopilot core packs, compass instruments, SportPilot, and SmartPilot systems. It includes a 30 foot connection cable and stainless, non-magnetic mount. M81190 Features: Replacement Fluxgate Compass Module, Part Number: M81190, 30 Ft Connection Cable, Includes Stainless, Non-Magnetic Mount"

Clipper Compass System W/Removable Fluxgate Sensor $459.41 The Clipper Compass is a fully electronic compass with remote fluxgate sensor. The large clear display has 7 levels of illumination and gives True or magnetic heading. The sensor which is gimballed for plus/minus 45 degrees of pitch and roll is mounted in a position where stray magnetic fields are at a minimum. An electronic auto calibration then cancels out small errors. Steer to Course Function When the steering function is selected a series of chevrons accumulate showing the magnitude and direction of the steering error. To stay on course simply turn the wheel in the direction of the chevrons until they are extinguished. The steering sensitivity can be preset by the user. An off course alarm provides a safety feature when not at the helm. If the heading deviates by more than a preset amount then the alarm will sound. Technical Specifications:. Supply voltage nominal 12v DC. Consumption 120mA+ (25mA for display illumination max). Fluxgate accuracy +/ 1 degree. Adjustable Damping. 1 Degree display resolution. Display case size 110 x 110 m . Depth behind panel 30mm. Fluxgate 175mm diameter x 95mm. Sensor supplied with 5 meters of cable. Extension cables available. Product : CLIPPER COMPASS SYSTEM WITH REMOTE FLUXGATE SENSOR. Manufacturer : CLIPPER. Manufacturer Part No : CLC

SIMRAD 22090187 Fc40 Fluxgate Compass with 5m Simnet Cable $598.02 Simrad FC40 Fluxgate CompassThe Simrad FC40 fluxgate compass is designed for connection to the SimNet network. It is equipped with 5 5 m (18 feet) of SimNet cable with connector. The compass transmit the heading even if the autopilot is switched off.Input from SimNet. Heading offset. Calibration start. Software uploadOutput on SimNet/NMEA2000 FormatThe compass is NMEA2000 compatible and outputs PGN 127250.. Calibrated heading transmission rate of 20 Hz when selected as heading source on SimNet otherwise 1 Hz.. Magnetic field data. Error messages and status informationSpecifications:. GPS/Navigation: DGPS: Heading Accuracy +/ 3 degrees after calibration. Autopilot/Autosteering: Automatic Compass Calibration Yes. Technical/Environmental:Housing Off white ABSMouting Deck or bulkheadWidth 102.4 mm / 4 in.Height 72 mm / 2.8 in.Length 106.4 mm / 4.2 in.Weight 0.4 kg / 0.88 lbs.. Power:Power Supply 816V via SimNet vDCPower Consumptioni 1 4 W. Other:Compass Safe Distance 500 mm / 19.7 in.List of Specified Standards Environmental Protection: IP56Operating Temperature 0 to +55 degrees Operating Temperature Stored 30 to +70 degrees. Product : SIMRAD FC40 FLUXGATE COMPASS. Manufacturer : SIMRAD. Manufacturer Part No : 22090187. UPC : 809190331808

Compass $12.49 Compass

Fluxgate Magnetometers for Space Research $39.56 All fluxgate magnetometers are based on the theory of H.Aschenbrenner and G.Goubau developed in 1936 and the first fluxgates developed by F.Frster.Already the early satellites like putnik 3(DolginovRussia,1958),Mariner 4 (NASA/USA ,1964), the first German satellite AZUR (Musmann, 1969) studying the magnetic fields of the Earth,Moon,Venus,Mars and other planets were using fluxgate magnetometers up to the latest NASA/ESA investigations on CASSINI (1998),and ESAs Rosetta(2004) and the first Ion Engine spacecraft\,NASADEEPSPACEONE(Musmann/Kuhnke,1998),(see cover.) Very precise Earth magnetic field measurements in space have been made using fluxgate magnetometers in combination with scalar magnetometers (MAGSATAcuna,1979;OERSTED Primdahl,1999;CHAMPLhr,2000) Only a few detailed descriptions about the theory and how to design and calibrate space fluxgate magnetometers and how to get reliable accurate magnetic field component measurements in space have been published.Therefore the worldwide small space fluxgate magnetometer community decided to document and save all their relevant knowhow on space fluxgate magnetometers in this book before retirement. Author: Dr Musmann, Gnter Binding Type: Paperback Number of Pages: 292 Publication Date: 2010/02/15 Language: English Dimensions: 7.00 x 10.00 x 0.61 inches

RayMarine E22048 Raymarine ST40 Compass System $264.99 "Raymarine ST40 Compass System Brand New Includes Two Year Warranty, The Raymarine E22048 ST40 electronic compass system complete with remote fluxgate sensor is compact in size and design, yet big on performance and features. The compass offers all essential heading information in a clear 7-segment digital and 36-segment analogue dial display . Heading data is provided in true and magnetic bearing mode and users are allowed to lock a bearing manually or automatically via a Raymarine autopilot course computer. The E22048 Compass has extra large digits and razor sharp LCD displays for outstanding visibility in all light conditions. Fully compatible with SeaTalk, ST40 Compass offers a choice of snap-on bezels in three different finishes for surface and bracket mounting options. E22048 Features: Electronic Compass System, Part Number: E22048, Seven Segment Digital Display, Surface & Bracket Mounts, SeaTalk Integration - For Sharing & Repeating Navigation Data, True & Magnetic Bearing Information, Three Levels of Backlighting, User & Autopilot Initiated Locked Bearing Mode, Self-Sealing Speed Transducer -For Easy Cleaning & Maintenance, User Adjustable Off Course Alarm, Master & Repeater Operation, Waterproof to CFR-46 Standard, Includes: Compass Display, Fluxgate Compass Transducer, Sun Cover, SeaTalk Cable, Mounting Hardware"

Digital Yachat / Digital Yacht HSC100 High Performance Fluxgate Sensor / ZDIGHSC100 $291.18 Digital Yachat - Digital Yacht HSC100 High Performance Fluxgate Sensor - ZDIGHSC100

RayMarine A22014-P Raymarine ST60 Plus Compass System $619.99 "Raymarine ST60 Plus Compass System Brand New Includes Two Year Warranty, The Raymarine A22014-P ST60 compass system provides accurate magnetic heading and course deviation information on a combination analog and LCD display. Offering 3 levels of backlighting, the compass instrument can be easily seen day or night. The ST60 Compass instrument provides compass heading, shown in digital form (numerals) plus, when in locked heading mode shows locked course heading in analog form by the pointer. The A22014-P Compass Instrument can also display Course-Over-Ground (COG) when interfaced with a SeaTalk GPS receiver as well as average heading. The compass display receives heading data either from a connected fluxgate compass transducer or via SeaTalk networking from other onboard data sources like an autopilot system. A22014-P Features: ST60 Plus Compass System, Part Number: A22014-P, Current, Locked & Average Heading Displays, Course Over Ground (COG) Display, Magnetic or True Hading Readout, Expandable SeaTalk Networking Technology, Intuitive 4-Button Control Layout, Adjustable Display Response Time, Use w/ SmartController Autopilot Control & Instrument Repeater, Includes: Display Unit, Sun Cover, SeaTalk Cable, Power Cable, Surface Mount Kit, Instructions Manual"

RayMarine A22007-P Raymarine ST60 Plus Compass Display $464.99 "Raymarine ST60 Plus Compass Display Brand New Includes Two Year Warranty, The Raymarine A22007-P ST60 compass system provides accurate magnetic heading and course deviation information on a combination analog and LCD display Offering 3 levels of backlighting as well as superior contrast and visibility. The compass display receives heading data either from a connected fluxgate compass transducer or via SeaTalk networking from other onboard data sources like an autopilot system (repeater mode.) The A22007-P compass instrument provides compass heading, shown in digital form and steering course error to /- 30 deviation of locked course heading, shown in analog form by the pointer.The ST60 Compass Instrument can also display Course-Over-Ground (COG) when interfaced with a SeaTalk GPS receiver as well as average heading. It is constructed in a rugged, waterproof case to provide reliable performance, even under the most demanding conditions. A22007-P Features: ST60 Compass Display, Part Number: A22007-P, Current, Locked & Average Heading Displays, Course Over Ground (COG) Display, Magnetic or True Hading Readout, Expandable SeaTalk Networking Technology, Intuitive 4-Button Control Layout, Adjustable Display Response, Use w/ SmartController Autopilot Control & Instrument Repeater, Includes: Suncover, SeaTalk Cable, Power Cable, Surface Mount Kit"

KVH Industries 01014801 Azimuth 1000 Compass White $899.93 The AwardWinning Digital Compass for PowerboatsThe Azimuth 1000 combines a digital fluxgate compass and an LCD display into one compact watertight unit. Ideal for all types of powerboats the Azimuth 1000s large headsup display provides easytoread heading compass rose and offcourse steering information. And with its standard NMEA 0183 output you can send its precise heading data to other onboard equipment. No matter how fast your speed or how rough the seas Azimuth 1000 keeps you steady on courseHighlights:Selfcontained for easy installation and designed to military quality standardsAutomatic compensation ensures the highest degree of accuracy (0.5)Backlit LCD display with rotating compass rose and large numerals offers clear viewing during both day and night;Interfaces with other NMEA 0183compatible equipment including radar autopilots plotters and PC softwareSimple pushbutton selection of offcourse mode and any of 10 damping levelsProduct : AZIMUTH 1000 COMPASS (W) 01014801 Manufacturer : KVH INDUSTRIES Manufacturer Part No : 01014801 UPC : 028327000299

Ritchie Navigator Compass Ritchie Compass Compass DNP200 $362.52 Ritchie Navigator Compass Ritchie Compass Compass DNP200

Raymarine E22048 12x 9x 4ST40 Compass System $403.97 Electronic compass system complete with remote fluxgate sensorCompact in size and design yet big on performance and features ST40 Compass offers all essential heading information in a clear 7segment digital and 36segment analogue dial display. Heading data is provided in true and magnetic bearing mode. ST40 Compass allows the user to lock a bearing manually or automatically via a Raymarine autopilot course computer. In this mode ST40 Compass shows deviations from locked bearing and the direction to steer to achieve the locked bearing heading. As with all ST40 displays ST40 Compass has extra large digits and razor sharp LCD displays for outstanding visibility in all light conditions. Fully compatible with SeaTalk ST40 Compass offers a choice of snapon bezels in three different finishes for surface and bracket mounting options. ST40 Features:Seven segment digits (1.1 digital and 0.7 analog) Surface and bracket mount options SeaTalk integration for sharing and repeating navigation data Optional clipon bezels Three levels of backlighting Selfsealing speed transducer for easy cleaning and maintenance Backlit push button controls Waterproof to CFR46 standard Operating voltage 7.5V to 16.5V Low operating current (40mA) Compatible as repeaters with ST30 ST50 ST50 Plus ST60 ST80 Raydata and the L760 Plus L755 Plus and L1250 FishfindersProduct : RAYMARINE ST40 COMPASS SYSTEM E22048 Manufacturer : RAYMARINE Manufacturer Part No : E22048 UPC : 023193220482

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