1 / 38

USCG/NOAA SARSAT CONFERENCE 2010 EPIRB’s How They Work

USCG/NOAA SARSAT CONFERENCE 2010 EPIRB’s How They Work. How the System Works. Types of Beacons. Maritime Distress Beacon. EPIRB s 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.

bona
Download Presentation

USCG/NOAA SARSAT CONFERENCE 2010 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 2010EPIRB’sHow They Work

  2. How the System Works L. Yarbrough/D7CFVS

  3. Types of Beacons Maritime Distress Beacon • EPIRBs 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

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

  5. Types of Beacons ELTs 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

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

  7. SENDs 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

  8. EPIRB • Maritime Satellite • Emergency • Position-Indicating • RadioBeacon L. Yarbrough/D7CFVS

  9. EPIRB Operational Requirements • EPIRB 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. • 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

  10. Hex ID • EPIRB’s identification, when decoded into its 15 character hexadecimal representation, which is the EPIRB’s unique identifier number. • http://www.cospas-sarsat.org/index.php/en/component/beacondecode/?task=showBeacon L. Yarbrough/D7CFVS

  11. L. Yarbrough/D7CFVS

  12. 406 Frequency Stability • Frequency stability very important • EPIRB gets on frequency fast and is super stable L. Yarbrough/D7CFVS

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

  14. Types of Brackets • Category 1 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

  15. Type of Brackets • Category 2 Manual Release Wet sense deactivation magnet No Bracket carriage requirement L. Yarbrough/D7CFVS

  16. Types of EPIRBs • Class A & B 121.5MHz and 243 MHz only • Now illegal to use in the USA • 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

  17. 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

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

  19. 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

  20. 406 MHz Detection Rangewith the USCG DF-430 L. Yarbrough/D7CFVS

  21. 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

  22. 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

  23. Beacon Switches L. Yarbrough/D7CFVS

  24. Beacon Switches L. Yarbrough/D7CFVS

  25. EPIRB 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

  26. 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

  27. 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

  28. 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

  29. 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

  30. EPIRB Control Functions L. Yarbrough/D7CFVS

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

  32. Brackets Brackets – Cat 1 L. Yarbrough/D7CFVS

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

  34. Brackets • Brackets - Cat 2 L. Yarbrough/D7CFVS

  35. Brackets L. Yarbrough/D7CFVS

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

  37. Bracket Water Testing L. Yarbrough/D7CFVS

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

More Related