1 / 42

USCG/NOAA SARSAT CONFERENCE 2011 EPIRB’s How They Work

USCG/NOAA SARSAT CONFERENCE 2011 EPIRB’s How They Work. How the System Works. C/S 406 MHz Beacons. COSPAS-SARSAT 406 MHz Beacons EPIRB Emergency Position Indicating Radio PLB Personal Locator Beacon ELT Emergency Locator Beacon SSAS Ship Security Alert System. Types of Beacons.

locke
Télécharger la présentation

USCG/NOAA SARSAT CONFERENCE 2011 EPIRB’s How They Work

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. USCG/NOAA SARSAT CONFERENCE 2011EPIRB’sHow They Work

  2. How the System Works L. Yarbrough/D7CFVS

  3. C/S 406 MHz Beacons • COSPAS-SARSAT 406 MHz Beacons EPIRB Emergency Position Indicating Radio PLB Personal Locator Beacon ELT Emergency Locator Beacon SSAS Ship Security Alert System L. Yarbrough/D7CFVS

  4. Types of Beacons Maritime Distress Beacon • EPIRB 406 MHz Automatic activation when out of bracket and wet. Floats up right able to transmit Strobe light Min 48 hour transmit Some GPS enabled L. Yarbrough/D7CFVS

  5. 406 MHz VDR • 406 MHz Voyage Data Recorder • EPIRB with black box data recorder built in. • Records last 12 hr “Black Box” data for ship. L. Yarbrough/D7CFVS

  6. Types of Beacons Distress Beacon for Personal Use (Land Rescue) • PLB Manual activation Carried on persons May or may not float Held out of water to transmit NO Strobe light required Min 24 hour transmit Some GPS Enabled L. Yarbrough/D7CFVS

  7. Types of Beacons ELT Aviation Distress Beacon Operational Applications • Automatic Fixed - AF • Automatic Portable - AP • Survival Equipment – S • Class A (buoyant) • Class B (non-buoyant) • Automatic Deployable - AD • 406 MHz ELTs 406/121.5 MHz 24 hr Transmitter “ON-OFF-ARMED-RESET” controls ELT activated by pilot, crash forces or water activated. L. Yarbrough/D7CFVS

  8. Types of BeaconsELT AD S Class B Aviation Distress Beacon AF AP S Class A L. Yarbrough/D7CFVS

  9. SSAS • 406 MHz Ship Security Alert System (SSAS) • All SOLAS vsls on international voyages. • Two stealth switches for remote activation. • Alert goes to Atlantic Area. L. Yarbrough/D7CFVS

  10. SEND SATELLITE EMERGENCY NOTIFICATION DEVICES • Operate over any satellite system except Cospas-Sarsat. • Provide individuals in remote areas a means to alert others of an emergency situation and to aid search and rescue personnel to locate those in distress. L. Yarbrough/D7CFVS

  11. C/S 406 MHz Beacon Operational Requirements • Beacon 406 MHz Signal - 5 Watts • Short bursts at approximately 50 second intervals (varies between 47.5 and 52.5 s), with a transmission time of 440 ms or 520 ms. • Transmits in the 406.0 to 406.1 MHz band. • Beacon Self Test L. Yarbrough/D7CFVS

  12. C/S 406 MHz Beacon Transmission Transmission consists: • Unmodulated carrier, for 160 ms, • Short synchronization signal, signal inverted for test, • Digital message that provides stored information (identification, nationality, type of user), • Optionally, current information like, type of emergency and estimated location. L. Yarbrough/D7CFVS

  13. 15 Hex ID • C/S Beacon identification, when decoded into its 15 character hexadecimal representation, which is the EPIRB’s unique identifier. • A C/S Decode Program is available at: http://www.cospas-sarsat.org/index.php?option=com_beacondecode&task=showBeacon&Itemid=85&lang=ennique identifier number. L. Yarbrough/D7CFVS

  14. 15 HexID • Bits 26 to 85 are converted from binary to hexadecimal. L. Yarbrough/D7CFVS

  15. L. Yarbrough/D7CFVS

  16. C/S Beacon Coding A Beacon Coding Guide is available at: http://www.cospassarsat.org/index.php?op=com_content&view=article&id=189&Itemid=118&lang=en L. Yarbrough/D7CFVS

  17. Available C/S Beacon Message Protocols • EPIRB = 10 protocols • PLB = 4 protocols • ELT = 12 protocols • SSAS = 1 protocol L. Yarbrough/D7CFVS

  18. Country Codes • MID or Country Codes are assigned by the International Telecommunications Union (ITU). • US Country Codes: 366 is the preferred US Code, but 303, 338, 358, 367, 368, 369, 536 and 559 are available. MID = Maritime Identification Code L. Yarbrough/D7CFVS

  19. Country Codes • A full list of all the country codes is available to download at: http://www.morrazo.org/baleadous/documentos/MMSI%20CODIGOS%20PAISES.pdf L. Yarbrough/D7CFVS

  20. C/S 406 MHz 406 Frequency Stability • Frequency stability very important • C/S Beacon gets on frequency fast and is super stable L. Yarbrough/D7CFVS

  21. 406 MHz Detection Rangewith the USCG DF-430 L. Yarbrough/D7CFVS

  22. C/S Beacon Self Test • Battery Voltage Check • Full Circuitry Check • Test Data burst • GPS acquisition Test (Self Locating) • Not required to check remaining power available in the battery. L. Yarbrough/D7CFVS

  23. EPIRB • C/S 406 MHz Maritime Satellite • Emergency • Position-Indicating • RadioBeacon L. Yarbrough/D7CFVS

  24. EPIRB Operational Requirements • Strobe Light • Auxiliary Radio-Locating Device121.5 MHz, 25 mW, Warble, (US. and SOLAS requirement) • Lanyard – 5 to 8 meters • Battery – 48hrs of continuous operation • Buoyancy and Stability – float upright • Designed to prevent inadvertent activation L. Yarbrough/D7CFVS

  25. Types of Brackets • Category 1 (Float Free) Automatic Release between 4 to 13 ft. EPIRB is transmitting when it gets to the surface Hydrostatic release needs replacement every two years. L. Yarbrough/D7CFVS

  26. Type of Brackets • Category 2 (Non Float Free) Manual Release Wet sense deactivation magnet No Bracket carriage requirement L. Yarbrough/D7CFVS

  27. Types of EPIRBs • Class A & B 121.5MHz and 243 MHz only • Now illegal to use in the USA • No Satellite Detection • 406 MHz and 121.5 EPIRB • Cat 1 and 2 brackets, Class 1 and 2 batteries • 406 MHZ and 121.5 Self locating EPIRB • Cat 1 and 2 brackets, Class 1 and 2 batteries, GPS interface or internal GPS L. Yarbrough/D7CFVS

  28. Class 1 and 2 Batteries • Operating • Class 1 -40° to + 55° C • Class 2 -20° to + 55° C • Stowage • Class 1 -50° to + 70° C • Class 2 -30° to + 70° C L. Yarbrough/D7CFVS

  29. Lanyard Lanyard: 5 to 8 meters Orange/yellow color Not rot/deteriorate L. Yarbrough/D7CFVS

  30. Battery Replacement • Required at Expiration date or if EPIRB activated for any reason besides test. • Expiration of battery = ½ Useful Life. • Useful Life = power for all required testing + 48 hrs operation. L. Yarbrough/D7CFVS

  31. EPIRB Operational Requirements • Positive visual and/or audible indication that EPIRB is activated (strobe light flashing). • Easily manually deployed, activate, and deactivated, and transferred to survival craft. • Not be activated or deactivated by conditions encountered in maritime environment. L. Yarbrough/D7CFVS

  32. EPIRB Control • Ready – EPIRB will be ON in the water unless in its bracket. Sometimes labeled “OFF”. • ON – EPIRB operates regardless of location or orientation. Unconditional “ON” position. (Requires two physical actions) • Test – Self-test Function. L. Yarbrough/D7CFVS

  33. EPIRB Switches L. Yarbrough/D7CFVS

  34. Prevention of Inadvertent Activation • Must be fitted with means to prevent inadvertent activation and deactivation. • Not automatically activate when water washes over while in bracket. • Most EPIRBs use bracket with magnet to disable activation circuit. L. Yarbrough/D7CFVS

  35. EPIRB Deactivation • Remove beacon from water and dry off or replace in bracket • Move switch to OFF or Ready position • Remove cover and disconnect battery L. Yarbrough/D7CFVS

  36. EPIRB Activation • How • By definition it transmits: • out of bracket and wet, • by manual switch, in or out of bracket, Or • Self test L. Yarbrough/D7CFVS

  37. EPIRB Activation • What Happens; • Beacon starts transmitting its Unique Hex ID in a 406 MHz digital message, • 121.5 MHz homer with an audible warble, • Strobe Light starts flashing. L. Yarbrough/D7CFVS

  38. Brackets • Brackets – Cat 1 L. Yarbrough/D7CFVS

  39. Brackets • Brackets - Cat 1 L. Yarbrough/D7CFVS

  40. Testing Bracket Magnet A Compass provides simple detection on bracket magnet. L. Yarbrough/D7CFVS

  41. Bracket Water Testing L. Yarbrough/D7CFVS

  42. Questions? Larry.T.Yarbrough@uscg.mil (305) 415 6868 L. Yarbrough/D7CFVS

More Related