Magnetic Instrument Base

Magnetic Instrument $24.99 Magnetic Instrument - Photographic Print

Medline Magnetic Instrument Mat - Drape, Instrument, Magnetic, 10X16. Case of 30 $175.72 Manufacturer: Medline. Case of 30. Magnetic Instrument Mat: Magnetic Instrument Mats allow safe, quick access to instruments. Our mats conform to the contours of a patient's body. This product features a non-slip foam backing that helps prevent shifting o

Central Tools CEN3D102 Dial Indicator Set with On/Off Magnetic Base $154.39 Features and Benefits: A 01 dial indicator set Comes packaged in a wooden boxThis instrument is used to accurately measure a small distance. This set measures 0 to 1 in .001 graduations. Comes with a on/off magnetic base with flexarm. This is very simple to use.

Magnetic Super Base Fixture $187.83 PLEASE NOTE: THIS ITEM CANNOT SHIP VIA 3-DAY DELIVERY.Magnetic Fixture for the Magnetic Super Base.

Replacement Magnetic Base $40.99 Cortech Replacement Magnetic Base Click Here for Additional Luggage Information

Central Tools Dial Indicator Set w/On/Off Magnetic Base. Each $133.66 Manufacturer: Central Tools. Each. Features Benefits: A 0-1" dial indicator set Comes packaged in a wooden box This instrument is used to accurately measure a small distance. This set measures 0" to 1" in .001" graduations. Comes with a on/off magnetic

Magnetic Map Pocket $22.99 River Road Magnetic Map Pocket Non-abrasive/non-slip magnetic base for metal fuel tank applications Designed to fit tanks with gauge/instrument panels RoadTex 1000 denier nylon and clear vinyl with PVC coating UV protection Zippered pouch Small = 9"W (top) x 8"W (bottom) x 7"H Medium = 10-1/2"W (top) x 9"W (bottom) x 9"H **Note: map not included Click Here for Additional Luggage Information

Medline Sterile Magnetic Instrument Mat - Drape, Instrument, Magnetic, 20X16. Case of 20 $189.23 Manufacturer: Medline. Case of 20. Sterile Magnetic Instrument Mat: Magnetic Instrument Mats allow safe, quick access to instruments. Our mats conform to the contours of a patient's body. This product features a non-slip foam backing that helps prevent sh

Sunsun JVP-101B aquarium wave maker(Magnetic Base) $23.16 3000L/Hr wave maker Magnetic base

Sunsun JVP-102B aquarium wave maker(Magnetic Base) $13.68 5000L/Hr wave maker Magnetic base

Sunsun JVP-201B aquarium wave maker(Magnetic Base) $14.74 6000L/Hr wave maker Magnetic base

Sunsun JVP-202B aquarium wave maker(Magnetic Base) $16.84 12000L/Hr wave maker Magnetic base

MacGregor Magnetic Super Base $212.29 PLEASE NOTE: THIS ITEM CANNOT SHIP VIA 3-DAY DELIVERY.LITTLE LEAGUE® APPROVED. Reduce the risk of serious injury to sliding players with this unique base designed for all ages. According to Rule 1.06 of the Little League® rule book, "Beginning with the 2008 season, it will become mandatory that all leagues utilize bases that disengage their anchor. Leagues are encouraged to begin the process of implementing these types of base systems during the current season on all their fields so that the process is completed by the 2008 season."Features:Bases release when the magnetic attraction between the base and magnetic fixture are overcome by excessive force from a short slide.3 different plate sizes that bolt to the bottom of the base pan to adjust the holding strength of the base to the anchor.Base cover has a ribbed surface design to reduce the risk of slipping.Durable rubber base cover and steel stanchion pan for excellent durability.Regulation size 15" x 15" x 3".Designed to fit all female style ground anchors, not included. Complete Base - includes base cover, stanchion pan, ground insert and 3 interchangeable plates to adjust holding strength.Note: Even bases designed to reduce sliding injuries are not a substitute for using proper sliding techniques

Macgregor Magnetic Super Base $199.04 LITTLE LEAGUE® APPROVED. Reduce the risk of serious injury to sliding players with this unique base designed for all ages. According to Rule 1.06 of the Little League® rule book, Beginning with the 2008 season, it has become mandatory that all leagues utilize bases that disengage their anchor. Features: Bases release when the magnetic attraction between the base and magnetic fixture are overcome by excessive force from a short slide. 3 different plate sizes that bolt to the bottom of the base pan to adjust the holding strength of the base to the anchor. Base cover has a ribbed surface design to reduce the risk of slipping. Durable rubber base cover and steel stanchion pan for excellent durability. Regulation size 15" x 15" x 3". Designed to fit all female style ground anchors, not included. Complete Base - includes base cover, stanchion pan, ground insert and 3 interchangable plates to adjust holding strength.Note: Even bases designed to reduce sliding injuries are not a subst

Giant Magnetic Base Ten $20.95 Model essential base ten and place value concepts on your whiteboard so the whole class can see. Helps students better visualize concepts through real photos with 3 D representation Coordinates with base ten block sets for hands on learning (LER 0930, LER 0931 or LER 0932) Includes 121 magnetic pieces: 100 units, 10 rods, 10 flats, 1 cube Flats measure 6.75"L x 6.75"H; units measure 0.625"L Grades 1+

K&M Single Peg Base and Instrument Pegs Flute Peg Only $9.95 K&M Single Peg Base and Instrument Pegs Flute Peg Only

K&M Single Peg Base and Instrument Pegs Piccolo Peg Only - 9.5mm $11.95 K&M Single Peg Base and Instrument Pegs Piccolo Peg Only - 9.5mm

Performance Gear Woodwind Modular Instrument Stand Double/Triple Base $15.95 Performance Gear Woodwind Modular Instrument Stand Double/Triple Base

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The MAGIC Of Bulgarian Voices& music - Elitsa & Stoyan -" Earth " AMAZING DRUMS

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.

About the Author

Ken Jones runs a Sailing Site.
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