Оборудование для коммуникации и безопасности на море

www. oceans ignal .com GEOSAR Satellites LEOSAR Satellites Whilst every effort has been made to ensure the information in this brochure is accurate, products and specifications may be changed without notice. GMDSS is an internationally operated system for Safety of Life at Sea (SOLAS). Developed by the International Maritime Organisation, the GMDSS was originally conceived for commercial shipping, but the systems used are equally applicable to all maritime users. The underlying principle is that ships should have at least two means of transmission of a distress alert to both shore infrastructure and to other ships. Additional equipment is carried to provide location and communication aids for use during the search and rescue phase. The SafeSea range of products fromOcean Signal provides a total solution for this class of equipment. EPIRB – how it works Ocean Signal EPIRBs operate in the 406MHz satellite band monitored by Cospas-Sarsat, ensuring a signal can be located wherever it is activated around the globe. On activation, the EPIRB commences transmission of a distress alert, which is picked up by two groups of satellites. The geostationary (GEOSAR) satellites will typically receive the alert first, but these satellites do not have the ability to generate location information and do not cover the Polar Regions. The second group of low earth orbiting (LEOSAR) satellites give complete global coverage, including the Polar Regions. As each satellite passes over an active EPIRB, it can calculate the approximate location (typically within 5Nm) of the beacon, using Doppler processing of the signal. The satellites pass the received alerts to Cospas- Sarsat headquarters, where it is then passed to the relevant National Rescue Coordination Centre. EPIRB without GPS: The SafeSea E100 EPIRB will have initiated a rescue attempt almost immediately after activation, but because of the nature of the satellite location process your position may not be known for some time afterwards as it depends on the orbit of the LEOSAR satellites which can take up to an hour to come into view. EPIRB with GPS: The SafeSea E100G EPIRB will transmit its known location as soon as a position fix has been obtained by the built-in GPS. These transmissions will be picked up by both types of satellite. This provides two significant advantages. • Immediate location of the vessel in distress • Excellent positional accuracy of the distress GMDSS