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GPS Based Speed
Question for Airplane Instrument Instructors?
I have just started my IFR training, and I can't find the answer to this anywhere. I understand that approach speeds are based on ground speed. If my airplane has GPS and uses Category A approach speeds and I am executing an approach, should I be using the groundspeed shown on the GPS, or should I be using the Airspeed Indicator and simply adjusting for the winds (example: if my approach speed should be 90 knots (groundspeed), and I have a 10 knot head-wind, should I adjust my speed so the the Airspeed indicator says 100 knots, or should I ignore the Airspeed Indicator and go off the GPS ground speed?)
Approach category is not based on ground speed, it based on a speed of VREF, if specified, or if VREF is not specified, 1.3 VSO at the maximum certified landing weight. VREF, VSO, and the maximum certified landing weight are those values as established for the aircraft by the certification authority of the country of registry. You must use the minima corresponding to the category determined during certification or higher. Indicated (calibrated) airspeed is the speed you reference.
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| | Cheetah Mirror GPS Based Speed Camera Detector $299.95 CHEETAH MIRROR GPS BASED SPEED CAM DETECTDrive safe and ticket-free 100 legal Mirror GPS speed camera detectorProvides alerts for fixed speed cameras, point-to-point speed cameras, camera van locations and red-light cameras Voice alerts tells user wh |
| | Cheetah Portable GPS-Based Speed Camera Detector $249.95 CHEETAH PORTABLE GPS BASED SPEED CAM DETECTProvides alerts for fixed speed cameras, point-to-point speed cameras, camera van locations and red-light camerasVoice alert tells type of camera, speed limit and over speed noticeLinear approach vectors mea |
| | Garmin Edge 500 GPS $249.99 Garmin Edge 500 GPS. Sharpen your cycling performance with Edge 500, a lightweight GPS-based cyclocomputer for performance-driven cyclists. Loaded with data, Edge 500 tracks your distance, speed, location and elevation with high sensitivity GPS. Add an ANT+ compatible heart rate monitor, speed/cadence sensor or compatible power meter for a finely-tuned analysis of your ride. |
| | Garmin GPS Edge 500 GPS Unit $249.95 Sharpen your cycling performance with Edge 500, a lightweight GPS-based cycling computer for performance-driven cyclists. Loaded with data, Edge 500 tracks your distance, speed, location and elevation with high sensitivity GPS. Add an ANT+ compatible heart rate monitor, speed/cadence sensor or compatible power meter for a finely-tuned analysis of your ride. Wt: 2 oz. |
| | Garmin GPS Edge 500 Bundle GPS Unit $349.95 Sharpen your cycling performance with Edge 500, a lightweight GPS-based cycling computer for performance-driven cyclists. Loaded with data, Edge 500 tracks your distance, speed, location and elevation with high sensitivity GPS. Add an ANT+ compatible heart rate monitor, speed/cadence sensor or compatible power meter for a finely-tuned analysis of your ride. Wt: 2 oz. |
| | GPS Module for PRO-3600 $57.94 The Whistler RLC-360 GPS Module integrates with the Whistler Pro 3600 radar detector and enhances the Pro 3600 with many GPS based features. With the Whistler RLC-360 module, the Pro 3600 will be enhanced with a nationwide database of speed and red light camera locations and will provide alerts as you approach these devices. These traffic cameras are constantly being added, and the RLC-360 can be updated via the Internet using the included USB cable. The addition of the RLC-360 module also activates other features of the Pro 3600, including the ability to display your vehicle's current speed and to automatically activate "auto quiet" and set filter modes based upon the vehicle's speed. |
| | Garmin Edge 500 GPS Bundle $403.99 Sharpen your cycling performance with Edge 500, a lightweight GPS-based cycling computer for performance-driven cyclists. Loaded with data, Edge 500 tracks your distance, speed, location and elevation with high sensitivity GPS. Add an ANT+ compatible heart rate monitor, speed/cadence sensor or compatible power meter for a finely-tuned analysis of your ride. Capacity: 2 oz. Battery life: Up to 18 hours rechargeable lithium-ion. Display: 1.17" x 1.44" (128 x 160 pixels). Edge bundle: Includes both the HRM and Speed/Cadence. |
| | Holux GPS Logger (M-241c) $92.4 OverviewThe M-241c is a high performance GPS logger with the following features:1. Powered by one AA battery.2. LCD display (32mm L x 8.9mm W) to show position information, speed, capable logging memory size, date & time.3. Capable memory size to record up to 130,000 positions, including longitude, latitude, time, and altitude.4. Personal settings to select the logging mode by distance or time, unit by Kilometer or mile, and 3 languages (English, Traditional Chinese, and Simplified Chinese) support.FeaturesBuilt-in MTK Low power consumption GPS chipset.32 parallel satellite-searching channels for fast acquisition and reacquisition.Superior sensitivity, up to -159 dBm.Built-in WAAS/EGNOS/MSAS Demodulator without any additional hardware.Low power consumption. Use AA alkaline batteries (or rechargeable batteries) for up to 12 hours of operation.Support NMEA0183 V 3.01 data protocolCompact and lightweight design for ease of use.LCD display (32mm x 8.9mm /128 x 32 pixels) to show position information, speed, capable logging memory size, date & time.Capable memory size to record up to 130,000 position data, including longitude, latitude, time, and altitude.Personal setting to choose the logging mode by distance or time, unit by Kilometer or mile, and 3 languages (English, Traditional Chinese, Simplify Chinese) support.Specifications:32 parallel satellite searching channelsReceiver: L1, 1575.42 MHzFrequency: 1.023 MHzUpdate frequency: 1 Hz.Antenna type: Built-inSatellite signal reception sensitivity: -159dBmDimensions: 32.1mm X 30mm X 74.5mmWeight (excluding battery): < 39g.Switch: Slider switch1 AA alkaline battery lasts for up to 12 hours of operationOperating temperature: 0 ℃ to + 50 ℃Storage temperature: -10 ℃ to + 60 ℃Operating humidity: 5% to 90%PositioningNon DGPS (Differential GPS)：Position : 3.0 M CEP excluding SAVelocity: 0.1M / sec.Interval: 0.1 sec to Sync GPSDGPS (EGNOS/WAAS/MSAS)：Position: < 2.2 M., Horizontal deviation 95% time < 5 M., Vertical deviation 95 % time *The above data is based on the specifications of the MTK GPS chipPositioning TimingTime to reposition < 0.1 sec averageHot boot 1 secWarm boot 33 secCold boot 36 sec*The above data are based on specifications of the MTK GPS chipProtocol and InterfaceBluetooth compatible serial specifications (SPP)Bluetooth V1.2 compatibleBluetooth class 2 (within 10m of range in open space)Frequency: 2.400 to 2.480 GHzModulation: FHSS / GFSKRF channels: 79Input sensitivity: -85dBmOutput power: +2dBmOutput port: Mini-USB (CMOS Level)NMEA protocol output: V 3.01Baud rate: 38400 bpsData bits: 8Sync bits: NEnd bit: 1Output interface:Standard: GPGGA (1 time per second), GPGSA (1 time per second), GPGSV (1 time per second), GPRMC (1 time per second), GPVTG (1 time per second).Physical SpecificationsSea level: Max 18,000 M (60,000 feet)Velocity: Max 515 M./sec ( 1000 knots)Acceleration: Max 4GVibration: 20 M/ second3, Max.Buttons: 1 Power s |
| | Garmin Edge 500 GPS Bundle with Heart Rate/Cadence $349.99 Garmin Edge 500 GPS Bundle with Heart Rate/Cadence. Sharpen your cycling performance with Edge 500, a lightweight GPS-based cyclocomputer for performance-driven cyclists. Loaded with data, Edge 500 tracks your distance, speed, location and elevation with high sensitivity GPS. Add an ANT+ compatible heart rate monitor, speed/cadence sensor or compatible power meter for a finely-tuned analysis of your ride. Includes a digital heart rate strap and speed/cadence sensor. |
| | GP32 WAAS/GPS Navigator $407.94 GP32 WAAS/GPS Navigator Compact in size, waterproof, yet big on power, features and performance, Furunos GP32 is perfect for a wide range of smaller fishing boats and pleasure craft. This advanced unit, based on the popular GP31, provides accurate and reliable position fixing, thanks to a super sensitive, 12-channel GPS receiver combined with integrated WAAS technology.The unit has a waterproof display and is built to stand up to tough marine conditions. This durable casing houses an impressive memory, capable of storing up to 1,000 points of ships track, 999 points for marks and waypoints, and 50 routes of up to 30 waypoints each. Vital navigation data is presented on a 4.5-inch diagonal Silver Bright LCD screen with adjustable brilliance. Innovative graphic displays include Nav, Highway, Steering, Track Plotting, and two operator programmable modes, all extremely easy to use. The GP32, like all Furuno nav receivers, feature Furunos NMEA 0183 programmable interface system for feeding highly accurate nav data to your Furuno radar, chart plotter, autopilot or sounder. It even includes a dedicated RS-232 port for connection to a PC. And of course, it integrates perfectly with Furuno's NavNet line of Radar/Chart Plotters.Standard Features12 Channel, Parallel Tracking GPS Receiver with WAAS technology, DGPS ReadyUp to 900 Knot Tracking Velocity20 Second Warm Start Acquisition1-3M Accuracy (95% of the time with WAAS on and SA off)4.5 Inch Diagonal Monochrome High Contrast Silver Bright LCD ScreenWaypoint and Route Data Transfer Via PC to another GP325 Display Modes available 1. Plotter - 14 Plot Scales from 0.2 - 320 N.M. 2. NavData - Position Indication in Lat./Long or Loran-C TD's 3. Steering - Graphic Vessel Course, Position and Speed Information 4. Highway - 8 Range Scales from 0.2 - 16 N.M. 5. Analog or Digital Display Speedometer 6. Two user customizable displaysMan Overboard KeyWaypoint entry by Loran-C TD's (Highway Mode)Alarms for Arrival, XTE, Anchor Watch and High/Low Speed PointsMemory Capacity: 1000 Points of Vessel Track, 999 Points for Waypoints and Marks, and 50 Routes comprised of up to 30 WaypointsWaypoint Comments of up to 16 CharactersEvent Marks Entered using one of Nine Symbols2 Data Ports for both RS422 and RS232Feed nav data to radar, chart plotter, autopilot or sounder through NMEA0183 portUpload/Download waypoints and routes directly from NavNet displayBuilt in Simulator for Showroom Display and TrainingShipping Information5Lbs., 1 CartonPower Requirements12 or 24 VDC, 3 Watts |
| | GPS200 Nmea 2000 GPS Receiver $343.94 GPS200 Nmea 2000 GPS Receiver GPS200 - NMEA 2000 GPS Antenna/ReceiverMaretron's GPS200 provides reliable position fixes 10 times per second, accurate boat speed four times per second, and precision time once per second. The GPS200 antenna/receiver is a plug-and-play device that is fully compliant and certified to the NMEA 2000 Standard. It will directly connect to any NMEA 2000 network and communicate with navigational software, chart plotters, autopilots and dedicated instrument displays - such as Maretron's N2KView Vessel Monitoring and Control system or DSM250 graphical display - and its compact, waterproof housing provides years of reliable performance.The GPS200 automatically decodes GPS correction signals from Satellite Based Augmentation Systems (SBAS) including the North American Wide Area Augmentation System (WAAS), the European Geostationary Navigation Overlay System (EGNOS), or the Asian Multifunctional Transport Satellite-based Augmentation System (MSAS) to provide better than 3m accuracy.The GPS200 is easily mounted to any 1" standard marine mount with its standard 1"-14 male threads. It can also be mounted directly to a deck. |
| | USB GPS Tracker Stick Data Logger Dongle $28.1 - Model: SJ-5282DL- GPS wafer version: M1218 GPS/AGPS- Frequency: L1,1575.42 MHz- C/A Code: 1.023MHz chip rate- Excellent GPS performance without the need to use an USB Extension Cable- Including longitude, latitude, speed, UTC,and tag data- The location histories can be exported to mapping software such as Google Earth or TrackMaker- USB version 2.0 interface- Adopt SkyTraq chipset with 65-Channel for fast acquisition and reacquisition- High sensitivity signal detection better than -160dBm- Excellent performance - Cold/Hot start time: 29/1 sec. (average)- Support standard NMEA0183- WAAS / EGNOS supported- Stores up to 100, 000 records or positions, including longitude, latitude, speed, UTC and tag data- User friendly and powerful window based GPS Photo Tagger software- USB cable, car power adapter and english user manual includedSpecificationsDimensions: 2.95 in x 1.18 in x 0.63 inWeight: 5.59 oz |
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No More Traffic Tickets: GPS based alert system
Do u believe the English gov. when supporting its story by hand held GPS re position of 15 sailors in golf?
Hand held GPS =0 as its not reliable & gives error >30miles!
* I bought one, then I had to return it back as it was showing me out of London while I was in it!
* GPS positions are accurate only when the satellite passes.
* Sat.passes at different intervals from 1/2 t0 3 1/2 hrs.
* Whithin those intervals, what u get from the Sat navigator (GPS) is approximate positions based on calculations between the lasdt two original GPSs, & that is regardless of water or air currents drifting,slowing or increasing the ship's speed.
* Especially in area near the coasts like in the Golf, the water currents change direction & speed v. rapidly.
* So theoritically they may be in Iraqi waters, But practically they were in Irani waters.
** I found it very stupid idea to prove that they were in Iraqi waters supported by a hand held GPS.
THIS IS HOW MODERS SHIPS RUN AGROUND IN THE eNGLISH CHANNEL, BECAUSE THE USERS DON'T KNOW HOW THOSE INSTRUMENTS WORK,IN THEORY THEY WERE ON COURSE BUT THEY R NOT!
I wouldn't believe Bush's lap poodle Tony Blair any farther than I could throw the H.M.S. Pinafore. He has been a dishonest and disgraceful representation of the British ever since he became Prime Minister. It looks like the Brits got caught with their knickers down. I wouldn't think it likely Iran would risk such a thing today unless they were right.
