The purpose of this report is to document the First Coast Guard District (CGD1) voice traffic baseline model and describe how it was constructed. Background The National Distress System (NDS), is a network of approximately 300 remotely-controlled VHF-FM radios and antennas used for monitoring the Maritime Distress Frequency (CH 16-156.8MHz) and for providing distress, safety, and United States Coast Guard (USCG) command & control (C(2)) communications coverage. The USCG is researching alternative communications systems for potential use in the modernization of the NDS. To assist in developing an estimate of the data and voice traffic carried over the NDS in the First Coast Guard District, computer simulations will be conducted using OPNET (a network simulation tool). Both present and future (next 4 years) projections will eventually be made for the model. A present-day voice traffic baseline model has been developed as a reference for forecasting potential future NDS traffic volume. The baseline model will be used to confirm the validity and credibility of the forecasted model. This report describes the First Coast Guard District NDS voice traffic baseline model.


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