AIS VDL Capacity Calculator - Number of Slots per Minute (FRAME)
This is a SIMPLE calculator which can be used in assiting the planning of an AIS coverage area. It is used in terms of our disclaimer notice.
This calculator does not take into account the dynamics of a RF environment. It only uses the AIS update rates as specified in the respective standards. Binary and safety related messages for both ships and base stations must me included in the Base Station FATDMA (slot reservation) calculation. Only Base Stations and AtoN's within direct coverage area of one another should be included for a total coverage are calculation.
This calculation includes units at anchor transmitting every 3 minutes, static and voyage releated messages transmitted every 6 minutes and AtoN and Base Station units with a transmission schedule exceeding 1 minute intervals. These transmissions are averaged out and included in the one minute time frame. As a result, values with fractions can occur.
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