ACR Electronics PLB-350B, 2883, 2882 manual Appendix B the COSPAS-SARSAT System, General overview

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APPENDIX B - THE COSPAS-SARSAT SYSTEM

1. General overview

Beacons transmit to the satellite portion of the Cospas-Sarsat system. Cospas- Sarast satellites are an international system that utilizes Russian Federation and United States’ low altitude, near-polar orbiting satellites (LEOSAR). These satellites assist in detecting and locating activated 406 MHz satellite beacons.

Cospas-Sarsat satellites receive distress signals from beacons transmitting on the frequency of 406 MHz. The Cospas-Sarsat 406 MHz beacon signal consists of a transmission of non-modulated carriers followed by a digital message format that provides identification data. The 406 MHz system uses satellite-borne equipment to asure and store the Doppler-shifted frequency along with the beacon’s digital data message and time of measurement. This information is transmitted in real time to

an earth station called the Local User Terminal (LUT), which may be within the view of the satellite, as well as being stored for later transmission to other LUTs.

The LUT processes the Doppler-shifted signal from the LEOSAR and determines the location of the beacon, then the LUT relays the position of the distress to a Mission Control Center (MCC) where the distress alert and location information is immediately forwarded to an appropriate Rescue Coordination Center (RCC). The RCC dispatches Search and Rescue (SAR) forces.

The addition of the GEOSAR satellite system greatly improves the reaction time for a SAR event. This satellite system has no Doppler capabilities at 406 MHz, but will relay the distress alert to any of the LUT stations. When there is GPS data included in the distress message, SAR authorities instantly know your location to within 110 yards (100 m). This speeds up the reaction time by not having to wait for one of the LEOSAR satellite to pass overhead. Because most of the search and rescue forces presently are not equipped to home in on the 406 MHz Satellite beacons signal, homing must be accomplished at 121.5 MHz.

Once the 406 MHz signal is relayed through the LEOSAR and/or GEOSAR network, SAR forces determine who is closest, and then proceed to the beacon using the 121.5 MHz homing frequency.

2. Global Positioning System (GPS)

The GPS system is a satellite group that enables a GPS receiver to determine its exact position to within 30 m (100 ft.) anywhere on earth. With a minimum of 24 GPS satellites orbiting the earth at an altitude of approximately 11,000 miles they provide users with accurate information

on position, velocity, and time anywhere in the world and in all weather conditions. Beacons that have GPS engines add this data to its distress transmission, allowing search and rescue forces to narrow the search to a very small area, thus minimizing the resources required, and dramatically increasing the effectiveness of the overall operation.

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Contents Y1-03-0241A Please Read ALL Warnings Table of Contents Step ONE Registering Your Beacon Suitland Road Suitland, MD What country should I register in?How do I register? Registration NOAA/NESDISHow your beacon brings help Step TWO HOW the Beacon WorksInternal GPS position system Front Back Anatomy of your beaconActivating your beacon Distinguishing PLB FeaturesKey Pad Functions PLB-350B406 MHz/121.5 MHz antenna position Activation 406 MHz and 121.5 MHzActivation with GPS GPS Receiver Location Turning off the beacon GPS receiver orientationFalse alert Preventing false alertsSelf-Test Routine MaintenanceBattery Replacement Step Three Maintaining Your PLBSelf-Test Sequences Self-Test Guide Battery witness seal failureGPS Test Sequences max GPS Test Guide Minutes 50 seconds GPS acquisition testChanging ownership or contact information Multi-Function Belt Clip Appendix a AccessoriesAttachment Clip General overview Appendix B the COSPAS-SARSAT SystemGlobal Positioning System GPS MHz Transmitter Appendix C Technical SpecificationsLimited Warranty Appendix D WARRANTY, Useful Life POLICY, NoticesUseful Life Policy Notified Body EC Declaration of Conformity

PLB-350B, 2883, 2882 specifications

ACR Electronics is a renowned name in the field of emergency signaling and safety devices. Among its various offerings, the ACR 2882, ACR 2883, and the PLB-350B Personal Locator Beacons (PLBs) stand out due to their advanced features and reliability.

The ACR 2882 and 2883 models are compact and rugged PLBs designed for outdoor enthusiasts, sailors, and adventurers who venture into remote areas. One of their main features is the dual frequency capability, which operates on both 406 MHz and 121.5 MHz frequencies. This dual-frequency technology enhances their effectiveness in emergency situations, ensuring that distress signals can be received by both satellite systems and local search and rescue teams.

Both models are equipped with a high-performance GPS receiver, which significantly improves location accuracy. In challenging environments, where precise positioning is crucial, these PLBs can obtain a location fix quickly and share it with rescue services. The compact design, weighing around 7 ounces, makes them portable enough to carry on any adventure without adding significant weight to your gear.

Battery life is another critical feature of the ACR 2882 and ACR 2883. They utilize a lithium battery that can provide up to 24 hours of continuous operation upon activation. This extended battery life ensures that users have a dependable signal even in prolonged emergencies, and they can be easily tested and replaced when needed.

On the other hand, the PLB-350B stands out with its innovative design and user-friendly interface. It features an intuitive one-button activation system that allows users to signal for help swiftly. Its rugged construction is built to withstand harsh conditions, making it suitable for a variety of outdoor activities like hiking, fishing, or boating.

Additionally, the PLB-350B includes a built-in strobe light, which serves as a visual distress signal, further increasing the chances of rescue. Its battery is designed to last for up to 7 years, offering a reliable solution for safety without frequent maintenance requirements.

Collectively, the ACR 2882, 2883, and PLB-350B represent the cutting edge of personal safety technology. With their advanced communication capabilities, durable design, and user-friendly features, these devices are essential tools for anyone who values safety during outdoor adventures. They provide peace of mind knowing that help is just a button press away, no matter where you find yourself.
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